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3 years ago

I need help with the first question

Chemistry

1 answer:

gregori [183]3 years ago

7 0

Zn⁰ ----> Zn⁺² + 2e⁻ - oxidation
Hg⁺² + 2e⁻ ----> Hg⁰ - reduction

Zn loses 2 moles of electrons , and Hg gains 2 mole of electrons.
So, number of moles of electrons gained and lost during reaction is equal.

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A volume of 90.0 mLmL of aqueous potassium hydroxide (KOHKOH) was titrated against a standard solution of sulfuric acid (H2SO4H2

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Answer:

0.823 M was the molarity of the KOH solution.

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$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is KOH.

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$2\times \1.50 M\times 24.7 mL=1\times M_2\times 90.0 mL$

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B. False and or sometimes.

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