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1988 WAEC Chemistry Theory 50cm\(^{3}\) of sulphur (IV) oxide were produced at s.t.p. when some quantity of powdered sulphur...

Chemistry
WAEC 1988

50cm\(^{3}\) of sulphur (IV) oxide were produced at s.t.p. when some quantity of powdered sulphur were burnt in excess oxygen

(a) Write the equation for the reaction

(b) Calculate the volume of oxygen used up during the reaction

(c) Which of the gas laws is applicable? State the law.

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Explanation

(a) S\(_{(g)}\) + O\(_{2(g)}\)  --> SO\(_{2(g)}\)

(b) At s.t.p. 22400 cm\(^3\) SO\(_2\) is produced with 22400cm\(^3\)O\(_2\)

i.e 1cm\(^3\) SO\(_2\) will be produced with 1cm\(^3\) O\(_2\)

50cm\(^3\) SO\(_2\) will be produced with 50cm\(^3\) O\(_2\)

(c) Avogadro's Law is applicable in (b) above. Avogadro's Law states that equal volumes of gases at the same temperature and pressure must contain the same number of molecules


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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts