DB325: Lesson 3 - Gas Laws SAQ: Suggested Response - Q4

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This lesson allows you to test yourself on the material covered in the Gas Laws lesson and determine the level to which you have met the learning outcomes.

Suggested Response - Q4

*Determine a factor for dissolved carbon dioxide in water to convert from v/v at STP to g/L.

Response:

Let us consider a dissolved CO₂ concentration of 1 v/v at STP in 1 L of water as a basis for the determination of our conversion factor.

1 v/v at STP in 1 L of water is a concentration of one litre of dissolved CO₂ in one L of water at STP.

Using the ideal gas law, we can determine the mass of 1 L of CO₂:

$P V space equals space m R subscript S p e c i f i c end subscript T$

$m space equals space fraction numerator P V over denominator R subscript S p e c i f i c end subscript T end fraction space equals space fraction numerator 101 comma 325 space cross times space 0.001 over denominator open parentheses begin display style fraction numerator 8 comma 314.54 over denominator 44 end fraction end style close parentheses space cross times space 273.15 end fraction space equals space 1.96 space g$

A dissolved CO₂ concentration of 1 v/v at STP is equivalent to 1.96 g/L.

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Lesson 3 - Gas Laws SAQ

Suggested Response - Q4

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