Some Basic Concepts Of Chemistry Question 49
Question: How many of $ 0.1NHCl $ are required to react completely with 1 g mixture of $ Na _2CO _3 $ and $ NaHCO _3 $ . containing equimolar amounts of two ?
Options:
A) 157.7mL
B) 15.77 mL
C) 147.7 mL
D) 14.77 mL
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ \underset{x}{\mathop{Na _2CO _3}}, $ $ \underset{(1-x)}{\mathop{NaHCO _3}}, $ $ \frac{x}{106}=\frac{1-x}{84} $ given (moles are equal) $ x=0.557 $ $ \frac{0.557}{53}+\frac{0.443}{84}=\frac{V\times 0.1}{1000} $ $ V=157.7mL $
