Answers 25-26 KCS18 Chemistry IC Dimensional AnalysisQuestion 1

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Dimensional Analysis

Question 1 • *25-26 KCS18 Chemistry IC

Potassium permanganate (KMnO4) reacts with hydrochloric acid (HCl) to form potassium chloride (KCl), manganese chloride (MnCl2), water (H2O), and chlorine gas (Cl2). The balanced chemical equation is 2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 8H2O + 5Cl2. Select the correct ratios of each of the following substances.KMnO4:KCl =

Answer

A

2:2

B

1:2

C

2:1

Explanation

Use the coefficients in the balanced equation: 2KMnO₄ + 16HCl → 2KCl + 2MnCl₂ + 8H₂O + 5Cl₂. The coefficient of KMnO₄ is 2, and the coefficient of KCl is also 2, so the ratio KMnO₄:KCl is 2:2. The correct choice is 2:2.

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