Experimental work (7) Answers

7. (a) The student has not included the water of crystallisation in the sum for the molar mass. The correct molar mass should be 126.05 g mol-1. [1]The correct concentration = 12.03 ÷ 126.05 = 0.0954 mol dm−3. [1](b) A volumetric flask. (The flask is filled until the bottom of the meniscus lies on the graduated mark.) [1](c) It will make the oxalic acid slightly weaker so more of the acid will be required to neutralise...

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