The image above shows what happens when hydrochloric acid (HCl) and sodium hydroxide (NaOH) are mixed with water. Which statemen
t below is true about both solutions?
A. Both solutions contain solutes that do not dissolve completely in water.
B. Both solutions are saturated because they contain the maximum concentration of a solute dissolved in the solvent.
C. Both solutions will conduct an electric current because they both contain ions that can carry a charge.
D. Both solutions are acidic because they both contain hydrogen.
A. Both solutions contain solutes that do not dissolve completely in water.
B. Both solutions are saturated because they contain the maximum concentration of a solute dissolved in the solvent.
C. Both solutions will conduct an electric current because they both contain ions that can carry a charge.
D. Both solutions are acidic because they both contain hydrogen.
1 answer:
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Answer:
3,78 mL of 12,0wt% H₂SO₄
Explanation:
The equilibrium in water is:
H₂O (l) ⇄ H⁺ (aq) + OH⁻ (aq)
The initial concentration of [H⁺] is 10⁻⁸ M and final desired concentration is [H⁺] =
Thus, you need to add:
[H⁺] = = <em>5,31x10⁻⁸ M</em>
The total volume of the pool is:
7,00 m × 18,0 m ×1,50 m = 189 m³ ≡ 189000 L
Thus, moles of H⁺ you need to add are:
5,31x10⁻⁸ M × 189000 L = 1,00<em>x10⁻² moles of H⁺</em>
These moles comes from
H₂SO₄ → 2H⁺ +SO₄²⁻
Thus:
1,00x10⁻² moles of H⁺ × = <em>5,00x10⁻³ moles of H₂SO₄</em>
These moles comes from:
5,00x10⁻³ moles of H₂SO₄ × ×
×
= <em>3,78 mL of 12,0wt% H₂SO₄</em>
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I hope it helps!