Q.

How many milli –litre of 0.5 M  H2SO4 are needed to dissolve 0.5 g copper (II) carbonate?

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answer is 8.

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Detailed Solution

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The molar mass of copper (II) carbonate is 123.5 g mol 0.5g of copper (II) carbonate corresponds to 0.5123.5=0.004g

1 mol of  H2So4=1mol  CuCO32

Thus , the volume of  0.5M H2So4 required will be 0.0040.5=0.008  L  or  8ml

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