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What is the percentage composition of carbon in Ca(HCO3)\(_{2}\) ? [ Ca = 40.0, 0=...

Chemistry
WAEC 2022

What is the percentage composition of carbon
in Ca(HCO3)\(_{2}\) ?
[ Ca = 40.0, 0= 16.0, C = 12.0, H= 1.0]

  • A. 22.2%
  • B. 14.8%
  • C. 7.4%
  • D. 3.7%
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Correct Answer: Option B
Explanation

. % of C in Ca(HCO3)2
Molar mass of Ca(HCO3)2 = 40+(1+12+(16*3))2
=40+(13+48)2
=40+122
=162
C/Ca(HCO3)2 x 100
=12 * 2/162 * 100
=14.8%


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