Neco Model Questions Vol1 2019 Chemistry Question 42

Practice objective / multiple choice question 42 from the 2019 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2019 Chemistry Objective / Multiple Choice Medium Difficulty
Question 42 NECO_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • objective

In the reaction \(\mathrm{CaCO_3 + 2\,HCl \rightarrow CaCl_2 + CO_2 + H_2O}\), 12.0 g of CaCO₃ is mixed with 15.0 g of HCl. After the reaction, 8.5 g of CaCl₂ is isolated. (a) Calculate the theoretical mass of CaCl₂ that could be formed, (b) the percent yield of CaCl₂, and (c) the mass of HCl that remains unreacted.

Answer Options

A. Theoretical mass = 13.3 g; percent yield = 58 %; excess HCl = 6.27 g
Correct Answer B. Theoretical mass = 13.3 g; percent yield = 64 %; excess HCl = 6.27 g
C. Theoretical mass = 14.0 g; percent yield = 64 %; excess HCl = 5.50 g
D. Theoretical mass = 12.8 g; percent yield = 66 %; excess HCl = 5.90 g
Correct Answer
B
Correct Option:
Theoretical mass = 13.3 g; percent yield = 64 %; excess HCl = 6.27 g

About This Question

This is Neco Model Questions Vol1 2019 Chemistry Question 42. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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