Chemistry College

what is the hydronium ion concentration in a solution formed by combining 750mL of 0.10M NaOH with 250mL of 0.30 M HCl

Answers

Answer 1

Answer:

$[H^+]=1x10^{-7}M$

Explanation:

Hello.

In this case, since the reaction between sodium hydroxide and hydrochloric acid has a 1:1 mole ratio between them:

$NaOH+HCl\rightarrow NaCl+H_2O$

In order to compute the hydronium H⁺ concentration in the mixed volumes of the given solutions we first compute the moles of each reactant:

$n_{NaOH}=0.750L*0.10mol/L=0.075mol\\\\n_{HCl}=0.250L*0.30mol/L=0.075mol$

As seen, since those amounts are the same, we infer all the acid and base are consumed so the pH is 7 because a neutral salt is produced, and the corresponding H⁺ concentration is:

$[H^+]=10^{-pH}=10^{-7}=1x10^{-7}M$

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Related Questions

What is the correct equilibrium constant expression for the following reaction? 3A2 = 2B3 when the reaction started with the initial concentrations of A2 = 3 M and B3 = 2 M and continued until the equilibrium concentrations of A2 = 2.5 M and B3 = 2.5 M

Answers

Answer:

Kc = [B₃]²/[A₂]³ = 0.40

Explanation:

3A₂ ⇄ 2B₃

Given at equilibrium => [A₂] =2.5 and [B₃] = 2.5

Kc = [B₃]²/[A₂]³ = (2.5)²/(2.5)³ = (2.5)⁻¹ = 0.40

At 298 K, Kc is 2.2×105 for the reaction F(g)+O2(g)⇌O2F(g) . What is the value of Kp at this temperature? Express your answer using two significant figures.

Answers

Answer:

The value of Kp at this temperature is 9.0*10³

Explanation:

The equilibrium constant Kp describes the relationship that exists between the partial pressures of the reactants and products, while Kc represents the relationship that exists between the concentrations of the reactants and products that participate in the reaction.

The general relationship between the constants Kp and Kc results:

Kp=Kc*$(R*T)^{moles of product - moles of reagent}$

In this case:

Kc= 2.2*10⁵R = gas constant = 0.0821 $\frac{atm*L}{mol*K}$ T = Kelvin temperature = 298 K moles of gaseous products - moles of gaseous reactants = 1 - 2 = -1

Replacing:

Kp=2.2*10⁵*$(0.0821*298)^{-1}$

Solving:

Kp≅9.0*10³

The value of Kp at this temperature is 9.0*10³

Read the quote from chapters 1-3 of Treasure Island. "He cleared the hilt of his cutlass and loosened the blade in the sheath; and all the time we were waiting there he kept
swallowing as if he felt what we used to call a lump in the throat." Based on these actions, what emotion is Black Dog feeling?
A. Anger
B. Fear
C. Joy
D. Excitement

Answers

It’s B, fear because it says that he felt as if he had a lump in his throat and that usually happens when your scared.

HELP!!
IF YOU DON'T KNOW THE ANSWER DON'T ANSWER!

Answers

I think it’s increases

Answer: increase

Explanation:

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This graph shows the displacements and times for the winner of
a horse race.
What was the average speed of the horse that won the race?
O 0.05 m/s
O 20 m/s
O 45 m/s

Answers

20 m/s
You can see in 5 seconds the horse goes 100 meters so you divide 100 by 5 to get 20.

scientist observes a 5-mL sample of
an unknown substance. It is a blue liquid with a
density of 1.2 g/cm3. The substance reacts with
carbon dioxide. List each of the properties of
matter the scientist observed and whether it is a
characteristic property of matter

Answers

Given what we know about the characteristics of matter and the observations given by the question, we can confirm that the characteristic properties observed by the scientists are the color, density, and the reaction of the liquid with carbon dioxide.

When we mention the properties of matter, we are speaking in general terms. Anything we can observe can be a property of the matter, such as:

Color Shape MassDensity

and etc. However, not all properties are characteristic properties of matter. These properties are reserved for those that do not change. Therefore, they are properties that can be used to identify matter.

Of the options listed, the properties that can be considered characteristic of this type of matter are the density, the color, and the reaction it has in the presence of carbon dioxide. This is because these properties will be the same anytime we have a sample of this matter, regardless of its mass, shape, or quantity.

To learn more visit:

https://brainly.com/question/1174549?referrer=searchResults

The products of the reaction between potassium hydroxide, KOH, and nitric acid, HNO3, are potassium nitrate and ____________________

Answers

Answer:

water (H2O)

Explanation:

Answer:

water (H2O)

Explanation:

HNO3 is the chemical formula representing nitric acid, KOH is the formula representing potassium hydroxide, H2O is the formula for water and KNO3 is the formula for potassium nitrate. Potassium nitrate is soluble in water, so it will just dissolve.

What is a reduction reaction?

Answers

Answer:

Reduction involves a half-reaction in which a chemical species decreases its oxidation number, usually by gaining electrons. The other half of the reaction involves oxidation, in which electrons are lost. Together, reduction and oxidation form redox reactions (reduction-oxidation = redox).

Explanation:

Hope this helps :)

the transfer of electrons between species in a chemical reaction where there is a process of gaining electrons or a decrease in the oxidation state by an element.

1. Determine whether the following hydroxide ion concentrations ([OH−]) correspond to acidic, basic, or neutral solutions by estimating their corresponding hydronium ion concentrations ([H3O+] using the ion product constant of water (Kw).
Kw = [H3O+][OH−] = [1×10−7 M][1×10−7 M] = 1×10−14 M
Hydronium ion concentration [H3O+] Solution condition
Greater than 1×10−7 M Acidic
Equal to 1×10−7 M Neutral
Less than 1×10−7 M Basic
Drag the appropriate items to their respective bins.
1. [OH−] = 6×10−12 M
2. [OH−] = 9×10−9 M
3. [OH−] = 8×10−10 M
4. [OH−] = 7×10−13 M
5. [OH−] = 2×10−2 M
6. [OH−] = 9×10−4 M
7. [OH−] = 5×10−5 M
8. [OH−] = 1×10−7 M
A. Acidic
B. Neutral
C. Basic
2. A solution has [H3O+] = 5.2×10−5M . Use the ion product constant of water
Kw=[H3O+][OH−]
to find the [OH−] of the solution.
3. A solution has [OH−] = 2.7×10−2M . Use the ion product constant of water
Kw=[H3O+][OH−]
to find the [H3O+] of the solution.

Answers

Answer:

Question 1.

1. [OH−] = 6×10−12 M is less than 1 * 10⁻⁷, therefore is acidic.

2. [OH−] = 9×10−9 M is less than 1 * 10⁻⁷, therefore is acidic.

3. [OH−] = 8×10−10 M is less than 1 * 10⁻⁷, therefore is acidic.

4. [OH−] = 7×10−13 M is less than 1 * 10⁻⁷, therefore is acidic.

5. [OH−] = 2×10−2 M is greater than 1 * 10⁻⁷, therefore is basic.

6. [OH−] = 9×10−4 M is greater than 1 * 10⁻⁷, therefore is basic.

7. [OH−] = 5×10−5 M is greater than 1 * 10⁻⁷, therefore is basic.

8. [OH−] = 1×10−7 M is equal to 1 * 10⁻⁷, therefore is neutral

Question 2:

[OH⁻] = 1.92 * 10⁻⁸ M

Question 3:

[H₃O⁺] = 3.70 * 10⁻¹¹ M

Explanation:

The ion product constant of water Kw = [H₃O⁺][OH⁻] = 1 * 10⁻¹⁴ M² is a constant which gives the product of the concentrations of hydronium and hydroxide ions of dissociated pure water. The concentrations of the two ions are both equal to 1 * 10⁻⁷ in pure water.

A solution that has [OH⁻] greater than 1 * 10⁻⁷ is basic while one with [OH⁻] less than 1 * 10⁻⁷ is acidic.