Experimental work (5) Answers

IB Chemistry: Experimental work (5) Answers

Answers to Experimental work Question 5(b) Initially there will be a colourless liquid. When the MnO2 is added the black solid will be dispersed throughout the liquid and the liquid will effervesce as gas is evolved. The effervescence will decrease as the reaction proceeds and when the reaction is complete the MnO2 will settle as a black precipitate on the bottom of the flask leaving the clear solution above. [2]

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