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3 years ago

Which of these has a higher hydrogen ion concentration? *

Chemistry

1 answer:

Genrish500 [490]3 years ago

8 0

Answer:

pOH = 8.9

Explanation:

pOH+pH = 14

pH= 14- pOH

pOH = 8.9, pH=14-8.9 = 5.1

pOH = 5.5, pH=14-5.5 = 8.5

Than less pH , than more H+ ion concentration.

pH=5.1 <pH=8.5

pH=5.1 is more acidic solution

pH=5.1 or pOH=8.9 has a higher H+ concentration.

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An aqueous solution of nitric acid is standardized by titration with a 0.110 M solution of calcium hydroxide. If 21.1 mL of base

Mumz [18]

Answer:

$\large \boxed{\text{0.195 mol/L}}$

Explanation:

(a) Balanced equation

2HNO₃ + Ca(OH)₂ ⟶ Ca(NO₃)₂ + 2H₂O

(b) Moles of Ca(OH)₂

$\text{Moles of Ca(OH)}_{2} = \text{21.1 mL Ca(OH)}_{2} \times \dfrac{\text{0.110 mmol Ca(OH)}_{2}}{\text{1 mL Ca(OH)}_{2}}\\= \text{2.321 mmol Ca(OH)}_{2}$

(c) Moles of HNO₃

The molar ratio is 2 mol HNO₃:1 mol Ca(OH)₂

$\text{Moles of HNO}_{3} = \text{2.321 mmol Ca(OH)}_{2} \times\dfrac{\text{2 mmol HNO}_{3}}{\text{1 mmol Ca(OH)}_{2}}= \text{4.642 mmol HNO}_{3}$

(d) Molar concentration of HNO₃

$c = \dfrac{\text{moles of solute}}{\text{litres of solution}}\\\\c = \dfrac{n}{V}\\\\c= \dfrac{\text{4.642 mmol}}{\text{23.8 mL}} = \text{0.195 mol$\cdot$L$^{-1}$}\\\\\text{The molar concentration of the Ca(OH)$_{2}$ is $\large \boxed{\textbf{0.195 mol/L}}$}$

8 0

4 years ago

What are the Sun's layers, beginning with the innermost and moving out.

Lemur [1.5K]

Core, radiative zone, convective zone, photosphere, chromosphere, corona

4 0

3 years ago

What is the answer to #4

Anna71 [15]

Weight has to do with how hard gravity is pulling on it. While mass is do to with the atoms in the matter.

7 0

4 years ago

Aqueous solutions of hydrochloric acid and barium hydroxide can neutralize each other to produce a compound that is soluble in w

SpyIntel [72]

Answer:

Ba^2+ = Barium ion [Cation]

Cl-= Chloride ion [Anion]

Explanation:

Ba(OH)2 + HCl = BaCl2 + H2O is the reaction that happens.

You make an ionic compound which is soiuble in water Barium Chloride. The cation is Ba^2+ = Barium ion, Cl^ - = Chloride ion

Postive ions are cations and negative ions are anions thus

Ba^2+ = Barium ion [Cation]

Cl-= Chloride ion [Anion]

5 0

3 years ago

Uestion 1 how many grams of disodium ethylenediaminetetraacetate (molar mass = 372.24 g/mol) required to prepare 500. ml of a 0.

Jlenok [28]

The solution is as follows:

Important data:
*0.01 M solution = 0.01 moles <span>disodium ethylenediaminetetraacetate/ L solution
*1 L = 1000 mL
*Molar mass = 372/24 g/mol

Stoichiometric calculation:
0.01 mol/L * (1 L/1000 mL) * 500 mL * </span><span>372.24 g/mol = 1.8612 g

Therefore, you would need 1.8612 grams of </span>disodium ethylenediaminetetraacetate.

6 0

3 years ago