The molar solubility of Cd(OH)2 is 1.84×10−5M in water. The expected solubility of Cd(OH)2 in a buffer solution of pH=12 is: 1.84×10−9M 2.49×10−M 6.23×10−11M 2.49×10−10M
Answers
The expected molar solubility of Cd(OH)2 in a buffer solution of pH=12 is 4.92 × 10^(-11) M.
The expected molar solubility of Cd(OH)2 in a buffer solution of pH=12 can be determined using the following steps:
1. Calculate the concentration of OH- ions in the buffer solution:
pOH = 14 - pH = 14 - 12 = 2
[OH-] = 10^(-pOH) = 10^(-2) M = 0.01 M
2. Write the solubility equilibrium expression for Cd(OH)2:
Cd\((OH)_{2}\) (s) ⇌\(Cd_{2+}\) (aq) + 2OH- (aq)
Ksp = [\(Cd_{2+}\)] * [\(OH_{-}\)]^2
3. Determine the Ksp value from the given molar solubility in water:
Molar solubility of Cd(OH)2 in water = 1.84 × 10^(-5) M
Ksp = (1.84 × 10^(-5)) * (2 * 1.84 × 10^(-5))^2 = 4.92 × 10^(-15)
4. Calculate the expected solubility of Cd(OH)2 in the buffer solution:
Ksp = [Cd2+] * [OH-]^2
4.92 × 10^(-15) = [Cd2+] * (0.01)^2
[Cd2+] = 4.92 × 10^(-15) / (0.01)^2 = 4.92 × 10^(-11) M
Therefore, the expected molar solubility is 4.92 × 10^(-11) M.
To learn more about "molar solubility", visit: https://brainly.com/question/28202068
#SPJ11
Related Questions
Given that the density of air is 14.4, then the vapour of sulphur IV oxide is A. 16 B. 32 C. 64 D. 128
Thank you.
Answers
Answer:
32
Explanation:
The vapour density of a gas is the number of times a given volume of gas or vapour is as heavy as the same volume of hydrogen at a particular temperature and pressure.
Vapour density = 2 × relative molecular mass of the gas or vapour
Relative molecular mass of SO2 = 32 + 2(16) = 64
Hence;
Vapour density of SO2 = 64/2
Vapour density of SO2 = 32
Emission and abpsorption spectra from a given atom or molecule can tell us: Group of answer choices the composition of substances, even at great distances away, by identifying its uniques spectral fingerprint. The motion toward or away from us based on the doppler effect and corresponding red shift or blue shift The temperature of an object by using Wien's Law. All of the above.
Answers
Answer:
The motion towards or away from us based on the Doppler effect and corresponding red shift or blue shift.
Explanation:
The emission and absorption spectra demonstrates the lines where light has been absorbed by the atoms. The spikes can be observed due to atoms releasing photons at those wavelengths. Infrared and ultra violet waves can be observed during spectroscopy.
What is the periodic table?
Answers
Answer:
The periodic table, also known as the periodic table of chemical elements, is a tabular display of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is generally seen as an icon of chemistry.
Explanation:
The periodic table is a tabular arrangement of chemical elements that classifies elements according to repeating qualities and is structured by increasing atomic number. Metals are located on the left side of the table, whereas nonmetals are located on the right. The columns are referred to as groupings.
in pic
____________________________________________________
(Hope this helps can I pls have brainlist (crown)
The mirror in your bathroom is measured to be 3 meters wide. If the same measurement was taken using centimeters, the value of the measurement would:
decrease
stay the same
increase
be undeterminable
Answers
Answer:
increase
Explanation:
1m = 100cm
3m = 300m
300> 3
1what is the aim for the esterification experiment
2apparatus
3safety precautions required
4method
Answers
Answer:
WEAR YOUR SAFETY GOGGLES!!!!
Explanation:
acids can cause SERIOUS burns to your skin and eyes
What is 876 millimeters to decameters?
Answers
Answer: 0.0876 decameters
Explanation:
10000 mm=1 dm
876/10000=0.0876 dm
10. Lead nitrate solution mixed with sodium sulfate solution forms lead sulfate as a
precipitate.
Pb(NO3)2+ Na2SO4-
PbSO4+ 2NaNO3
In an experiment, the theoretical yield of lead sulfate for this reaction was 2.85 g.
In the experiment only 2.53 g of lead sulfate is obtained.
Calculate the percentage yield of lead sulfate in this experiment. * IT
Answers
Answer:
88%.
Explanation:
The percentage yield of lead sulfate in this experiment is 88% if 2.53 is divided by 2.85 and multiply by 100. The percentage yield can be calculated when the experimental yield is divided by theoretical yield and then multiply by 100. The percentage yield tells us about the actual yield that is gained in the end of experiment which is lower than theoretical yield.
Copper can have improved wear resistance if alloyed with ceramic alumina, al2o3. if a copper alloy has 9.9 wt % al2o3, what is its composition in mol %
Answers
In order to determine the composition of a copper alloy in mol %, we need to know the molar masses of copper and ceramic alumina (aluminium oxide). The molar mass of copper is 63.55 g/mol and the molar mass of ceramic alumina is 101.96 g/mol.
To calculate the composition of the copper alloy in mol %, we need to determine the number of moles of copper and ceramic alumina in the alloy, and then divide each by the total number of moles and multiply by 100%.
The weight percentage of al2o3 in the alloy is 9.9%, which means that 9.9 g of the alloy is al2o3. We can use the molar mass of al2o3 to convert this weight to moles:
9.9 g al2o3 / 101.96 g/mol = 0.097 moles al2o3
The total weight of the alloy is 100 g, so the weight of the copper in the alloy is 100 g - 9.9 g = 90.1 g. We can use the molar mass of copper to convert this weight to moles:
90.1 g Cu / 63.55 g/mol = 1.42 moles Cu
The total number of moles in the alloy is the sum of the moles of copper and al2o3:
1.42 moles Cu + 0.097 moles al2o3 = 1.52 moles
To determine the composition of the alloy in mol %, we divide the number of moles of each element by the total number of moles and multiply by 100%:
(1.42 moles Cu / 1.52 moles) * 100% = 93.42% Cu
(0.097 moles al2o3 / 1.52 moles) * 100% = 6.34% al2o3
Thus, the composition of the copper alloy in mol % is 93.42% Cu and 6.34% al2o3.
Learn more about Percentage Composition here: https://brainly.com/question/28497414
#SPJ4
Describe the formation of ionic bonds between elements from Group I and Group VII, including the use of dot-and-cross diagrams
Answers
Explanation:
In a physical change the nature of the substance, the particles of which it is composed and the numbers of particles remain unchanged. In a chemical change the properties of the new substances are different from the original, the particles are different and the number of particles can change
The formation of ionic bonds between elements from Group I (alkali metals) and Group VII (halogens) occurs through a transfer of electrons. Alkali metals have one valence electron in their outermost shell, while halogens require one more electron to complete their outermost shell and achieve a stable electron configuration.
Let's take the example of sodium (Na) from Group I and chlorine (Cl) from Group VII to illustrate the formation of an ionic bond. Sodium has one valence electron, while chlorine requires one electron to complete its outer shell.
In a dot-and-cross diagram, sodium is represented by the symbol Na, with a dot next to it representing its single valence electron. Chlorine is represented by the symbol Cl, with seven dots around it representing its seven valence electrons.
To form an ionic bond, sodium will transfer its single valence electron to chlorine. This results in sodium losing one electron to become a positively charged sodium ion (Na+), as it now has one less electron than protons. Chlorine, on the other hand, gains the electron from sodium, resulting in a negatively charged chloride ion (Cl-), as it now has one more electron than protons.
In the dot-and-cross diagram, the electron transfer is represented by an arrow from sodium to chlorine, indicating the movement of the electron. The final configuration shows the sodium ion (Na+) with no dots around it, indicating the loss of its valence electron, and the chloride ion (Cl-) with eight dots around it, representing the complete octet in its outermost shell.
The resulting sodium ion and chloride ion are held together by the strong electrostatic attraction between the oppositely charged ions. This attraction forms an ionic bond, creating an ionic compound known as sodium chloride (NaCl), commonly known as table salt.
This process of electron transfer and formation of ionic bonds occurs between elements from Group I and Group VII, leading to the creation of stable compounds with full outer shells for both elements.\(\huge{\mathcal{\colorbox{black}{\textcolor{lime}{\textsf{I hope this helps !}}}}}\)
♥️ \(\large{\textcolor{red}{\underline{\texttt{SUMIT ROY (:}}}}\)
Sonya reads the element riddle below. I am shiny. I form 1 ions. There’s more! I am the most reactive metal in Period 4. Who am I? Which element is the answer to the riddle? krypton potassium sodium bromine.
Answers
Answer:
The answer should be krypton Im doing the test rn.
Explanation:
The most reactive element in period 4 which is shiny and forms a +1 cation is potassium.
The periodic table is defined as an arrangement of elements in groups and periods. The elements in the same group have similar properties while the elements in the same period has the same number of shells.
The element in period 4 that is shiny, forms a cation of +1 charge and is the most reactive in period 4 is the element potassium.
Learn more about the periodic table: https://brainly.com/question/11155928
what are the reactants in the following equation: hcl(aq) nahco₃(aq)→ co₂(g) h₂o(l) nacl(aq)
Answers
Hydrogen chloride (HCl) and sodium bicarbonate (NaHCO3) are the reactants. The substances produced as a result of this reaction are CO2(g), H2O(l), and NaCl(aq).
The reactants in the following equation:
HCl (a q) + NaHCO3(a q) → CO2(g) + H2O(l) + Na C l (aq) are hydrogen chloride (HC l) and sodium bicarbonate (NaHCO3).
Explanation:
A reactant is a substance that undergoes change during a chemical reaction. A reaction equation includes the symbols and formulas of reactants and products, along with the physical states of the substances, as they appear before and after the reaction.
The chemical reaction in this question is: HC l(a q) + NaHCO3(a q) → CO2(g) + H2O(l) + Na Cl (a q)In this equation, the reactants are H Cl (a q) and NaHCO3(a q), which are in an aqueous state.
Therefore, hydrogen chloride (H Cl) and sodium bicarbonate (NaHCO3) are the reactants. The substances produced as a result of this reaction are CO2(g), H2O(l), and Na Cl (a q).
to know more about reactants visit :
https://brainly.com/question/29035733
#SPJ11
Work, which is required to move a body from a resting position,
is called
A: kinetic energy
B: Potential Energy
C: Rotational Energy
D: Vibrational Energy
Answers
Can someone plz help me :(
Answers
Answer:
i Say B
Explanation:
because I don't know:)
Which will react with oxygen the fastest?a steel beama steel bridge an iron nailiron powder
Answers
Answer
Iron powder
Explanation
The one with the highest surface area will react with oxygen the fastest.
This is because if the surface area of a reactant is increased; more particles are exposed to the other reactant, and there is a greater chance of particles colliding, which leads to more successful collisions per second. Hence the rate of reaction increases.
The one with the highest surface area is iron powder.
A student describes a substance as lacking a definite shape. The description also states that the particles of matter are close to each other but still able to flow past each other. Which type of substance is the student most likely describing?.
Answers
Based on the given description, the student is most likely describing a liquid.
As we know, liquids do not have any definite shape, but they do have a definite volume. This is because the particles of matter in a liquid are close together, but they are still able to flow past each other. Due to this property, liquid take the shape of its container.
Some examples of liquids include water, oil, and gasoline.
Other states of matter include solids and gases.
Solids have a definite shape and volume, and the particles of matter in a solid are not able to flow past each other.
Gases have no definite shape or volume, and the particles of matter in a gas are very far apart and are able to move freely.
Thus, the correct answer is liquids.
To learn more about liquids :
https://brainly.com/question/752663
#SPJ11
What numbers do I put on the right side?
Answers
The leftovers of \(C_2H_2\) will be 6 moles while the leftover of \(O_2\) will be zero.
Mole ratio of reactantsIn the originally balanced equation of the reaction, 2 moles of \(C_2H_2\) and 5 moles of \(O_2\) react completely to produce 4 moles of \(CO_2\) and 2 moles of \(H_2O\). This equation is balanced with no reactant left.
Now, 8 moles of \(C_2H_2\) were made to react with 5 moles of \(O_2\) in the second reaction. The mole ratio of the two reactants for complete reactions is 2:5. Thus, \(C_2H_2\) has been supplied in excess.
Since only 5 moles of \(O_2\) is available, only 2 moles of \(C_2H_2\) will be consumed. Thus, 6 moles of \(C_2H_2\) will be left while the oxygen will be completely consumed. That is, the amount of \(O_2\) left would be zero.
More on mole ratio of reactants can be found here: https://brainly.com/question/15288923
#SPJ1
what is the mass of an atom if the mass number is 101?
Answers
Under what conditions will a precipitate not form when an aqueous solution of AgNO3 is added to an aqueous solution of NaCl
Answers
When an aqueous solution of AgNO₃ is added to an aqueous solution of NaCl, a precipitate of AgCl typically forms. However, there are certain conditions under which a precipitate may not form.
One condition is if the concentration of either the AgNO₃ or NaCl solution is too low. In order for a precipitate to form, the concentration of both ions must be high enough to exceed their solubility product constant (Ksp). If the concentration of one or both solutions is too low, then the ions may not reach the saturation point necessary for precipitation.
Another condition is if the temperature of the solution is too high. As the temperature increases, the solubility of most solids increases as well. Therefore, if the temperature is high enough, the solubility of AgCl may exceed its Ksp, and a precipitate will not form.
Additionally, if the solution is agitated vigorously or stirred too quickly, the Ag⁺ and Cl⁻ ions may not have enough time to combine and form a solid precipitate. The ions need time to come into contact with one another in order for the AgCl crystals to form.
Finally, if there are impurities present in either solution, they may interfere with the formation of the precipitate. For example, if there are other anions present in the NaCl solution, they may compete with the Cl⁻ ions for the Ag+ ions, leading to the formation of other compounds instead of AgCl.
In conclusion, the conditions under which a precipitate will not form when an aqueous solution of AgNO₃ is added to an aqueous solution of NaCl include low concentrations of either solution, high temperatures, overly-agitated solutions, and the presence of impurities.
To know more about precipitate, refer
https://brainly.com/question/30386923
#SPJ11
Which of the samples pictured is most likely a nonmetal?
Answers
Answer:
c
Explanation:
Answer:
it is c because its a hard one and you should know what that is and it is a nonmetal even if not exactly its to be slightly
Explanation:
Twenty students were surveyed to find out how many hours of TV they watch during a school week. The results are shown to the right. Answer the following questions and round your answers to the nearest half hour. The mean of the data is ____ hours.
Answers
Answer: 4.5
Explanation:
Just did it
Answer:
5 Hours
Explanation: I just wanted to save your time and i added all the hours up divided by 20 which i got 4.95 then rounded up to 5.
Find the isotope nation and the decay particle
Answers
What properties do ionic compounds have?
A. low boiling point and conduct electricity when dissolved in water
B. high melting point and conducts electricity when dissolved in water
C. high boiling point and conducts electricity as a solid
Answers
Answer:
High melting point
Explanation: toook the quiz
What would be the atomic mass of Nitrogen-14
Answers
Answer:
The atomic mass of nitrogen is
14.0067 uYou learn more from failure than from successAnswer:
14.007 amu
Explanation:
Nitrogen has atomic mass of 14.007 amu.
i need help i do not get i at all
Answers
Answer:
A: Elements!!!
Explanation: Everything starts at an element!
Which could cause topsoil to be lost?
wind and water erosion
lack of use
compaction
desertification
Answers
Wind and Erosion lead to Washing away of top soil.
What Is Erosion?Erosion is the process that lead to the washing away of top soil leading to loss of nutrient, holes and many more.
The agents of erosion include wind, water and so on.
Strong wind will lead to the top soil to be remove when it is blowing. Water also when is is flowing turbulently maybe when rain fall can lead to loss of top soil.
Therefore, Wind and Erosion lead to Washing away of top soil.
Learn more about Erosion from the link below.
https://brainly.com/question/17905503
Amino axit X có công thức H2NCxHy(COOH)2. Cho 0,1 mol X vào 0,2 lít dung dịch H2SO4 0,5M, thu được dung dịch Y. Cho Y phản ứng vừa đủ với dung dịch gồm NaOH 1M và KOH 3M, thu được dung dịch chứa 36,7 gam muối. Phần trăm khối lượng của nitơ trong X là
Answers
Answer:
nH2SO4 = 0,1 mol
Đặt nNaOH = a; nKOH = 3a (mol)
Quy đổi phản ứng thành: {X, H2SO4} + {NaOH, KOH} → Muối + H2O
Ta có: nH+ = nOH- → 2nX + 2nH2SO4 = nNaOH + nKOH
→ 2.0,1 + 2.0,1 = a + 3a → a = 0,1
→ nH2O = nH+ = nOH- = 0,4 mol
BTKL: mX + mH2SO4 + mNaOH + mKOH = m muối + mH2O
→ mX + 0,1.98 + 0,1.40 + 0,3.56 = 36,7 + 0,4.18 → mX = 13,3 gam
→ MX = 13,3/0,1 = 133
→ %mN = (14/133).100% ≈ 10,526%
Which statement describes the moment magnitude scale
Answers
Answer:
The moment magnitude scale is a scale that rates earthquakes by estimating the total energy released by an earthquake . Estimating the total amount of energy released, enables comparison of earthquakes more accurately.
Answer:The moment magnitude scale is a scale that rates earthquakes by estimating the total energy released by an earthquake . Estimating the total amount of energy released, enables comparison of earthquakes more accurately.
All of the following contribute to the evolution of a species EXCEPT -
O Respiration
O Adaptations
O Mutations
ONatural selection
Answers
Answer:
Respiration
Explanation:
Respiration is the system of how an animal breathes
what type of reaction is MnS + 2HCl
Answers
Answer:
MnS + 2HCl➝MnCl2 + H2S
Explanation:
Hope it helps
Unlike bacteria, an animal cell contains
Answers
Answer:
Membrane
Explanation:
Unlike a bacteria , an animal cell contains membrane which bounds organelles.