2 years ago

What is the reduction half-reaction for the reaction of zinc with hydrochloric acid?

1 answer:

german2 years ago

6 0

2HCl (aq) + Zn²⁺ ⇒ ZnCl₂ + 2H⁺ Total Reaction

Leo goes Ger (Lose electron oxidize, Gain electron reduction)

Zn²⁺ + 2e⁻ ⇒ Zn Oxidation half-reaction

2H ⇒ 2H⁺ + 2e⁻ Reduction half-reaction

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The vapor pressure of water at 65oC is 187.54 mmHg. What is the vapor pressure of a ethylene glycol (CH2(OH)CH2(OH)) solution ma

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Answer:

173.83 mmHg is the vapor pressure of a ethylene glycol solution.

Explanation:

Vapor pressure of water at 65 °C= $p_o= 187.54 mmHg$

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The relative lowering of vapor pressure of solution in which non volatile solute is dissolved is equal to mole fraction of solute in the solution.

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$\frac{187.54 mmHg-p_s}{187.54 mmHg}=\frac{0.3603 mol}{0.3603 mol+4.5672 mol}$

$p_s=173.83 mmHg$

173.83 mmHg is the vapor pressure of a ethylene glycol solution.

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