Experimental work (2) Answers

IB Chemistry: Experimental work (2) Answers

Answers to Experimental work Question 2or CO32−(s) + 2H+(aq) → CO2(g) + H2O(l)(b) The carbon dioxide gas evolved causes effervescence so the cotton wool prevents any of the liquid escaping from the flask. [1](c) The end point occurs when the addition of one drop of the sodium hydroxide solution causes a faint pink colour to remain.[1](Note that the colour changes for common indicators are given in Section 22 of the...

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