Some Basic Concepts Of Chemistry Question 83

Question: The mass of $ BaCO _3 $ produced when excess $ CO _2 $ is bubbled through a solution of 0.205 mol $ Ba{{( OH )}_2} $ is:

Options:

A) 81 g

B) 40.5 g

C) 20.25 g

D) 162 g

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $ \underset{1,mol}{\mathop{Ba{{( OH )}_2}}},+CO _2\xrightarrow{{}}\underset{1,mol}{\mathop{BaCO _3}},+H _2O $

$ 1,mol,Ba{{(OH)}_2}=1mol,BaCO _3 $

$ \therefore 0.205molBa{{( OH )}_2}=0.205molBaCO _3 $ Wt. of substance = No. of moles x Molecular Mass $ =0.205\times 197.3=40.5g $



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