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1998 WAEC Chemistry Theory (a) List two uses of sodium trioxocarbonate (IV). (b) Sodium trioxocarbonate (IV) solution is alkaline....

Chemistry
WAEC 1998

(a) List two uses of sodium trioxocarbonate (IV).

(b) Sodium trioxocarbonate (IV) solution is alkaline.

(i) What phenomenon is responsible for this observation?

(ii) Name the product obtained on passing carbon (IV) oxide into saturated sodium trioxocarbonate (IV) solution.

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Explanation

(a) Uses of Na\(_2\)CO\(_3\)

- As a water softener

- For standardizing acids or as analytical reagent

- In the manufacture of glass. NaOH, paper, soap or detergent etc.

 

(b)(i) Hydrolysis accounts for the alkalinity of Na\(_2\)CO\(_3\)\(_{(aq)}\)

(ii) Sodium hydrogen trioxocarbonate (IV) is obtained when

- CO\(_2\) is bubbled into Na\(_2\)CO\(_{3(aq)}\).


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