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100 mL of an 0.0100 M aqueous solution of calcium hydroxide will absorb carbon dioxide according to the equation Ca(OH)2(aq) + 2 CO2(g) ⇌ Ca(HCO3)2(aq) The maximum volume, in mL, at STP of CO2 that could be absorbed by the solution is A - VCE - SSCE Chemistry - Question 12 - 2002 - Paper 1

Question 12

100 mL of an 0.0100 M aqueous solution of calcium hydroxide will absorb carbon dioxide according to the equation Ca(OH)2(aq) + 2 CO2(g) ⇌ Ca(HCO3)2(aq) The maximum... show full transcript

Worked Solution & Example Answer:100 mL of an 0.0100 M aqueous solution of calcium hydroxide will absorb carbon dioxide according to the equation Ca(OH)2(aq) + 2 CO2(g) ⇌ Ca(HCO3)2(aq) The maximum volume, in mL, at STP of CO2 that could be absorbed by the solution is A - VCE - SSCE Chemistry - Question 12 - 2002 - Paper 1

Step 1

Calculate moles of Ca(OH)₂

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Answer

First, determine the number of moles of calcium hydroxide in the solution. The formula to calculate moles is:

$n = C \times V$

where:

$n$ is the number of moles,
$C$ is the concentration (0.0100 M),
$V$ is the volume in liters (0.100 L).

So, $n = 0.0100 \text{ M} \times 0.100 \text{ L} = 0.00100 \text{ moles}$

Step 2

Calculate moles of CO₂ required

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Answer

According to the balanced equation, 1 mole of Ca(OH)₂ reacts with 2 moles of CO₂. Thus, the moles of CO₂ required are:

$n_{CO2} = 2 \times n_{Ca(OH)2} = 2 \times 0.00100 = 0.00200 \text{ moles}$

Step 3

Calculate volume of CO₂ at STP

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Answer

At standard temperature and pressure (STP), 1 mole of a gas occupies 22.4 L. Therefore, we can find the volume of CO₂ that can be absorbed:

$V = n_{CO2} \times 22.4 \text{ L/mol} = 0.00200 \times 22.4 = 0.0448 \text{ L}$

Converting this to mL: $0.0448 \text{ L} \times 1000 \text{ mL/L} = 44.8 \text{ mL}$

Step 4

Final Answer

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Answer

The maximum volume, in mL, at STP of CO₂ that could be absorbed by the solution is 44.8 mL.

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100 mL of an 0.0100 M aqueous solution of calcium hydroxide will absorb carbon dioxide according to the equation Ca(OH)2(aq) + 2 CO2(g) ⇌ Ca(HCO3)2(aq) The maximum volume, in mL, at STP of CO2 that could be absorbed by the solution is A - VCE - SSCE Chemistry - Question 12 - 2002 - Paper 1

Calculate moles of Ca(OH)₂

Calculate moles of CO₂ required

Calculate volume of CO₂ at STP

Final Answer

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