How many milliters of a 0.200 M HNO3 solution are needed to dissolve 0.750 g of...

Question

Question

How many milliters of a 0.200 M HNO3 solution are needed to dissolve 0.750 g of Cu?

Answer 1

Answer #1

Reaction is

Cu + 4 HNO3 .............> Cu(NO3)2 + 2 NO2 + 2 H2O

One mole Cu react with 4 mole HNO3.

0.750 g of Cu = mass / molar mass = 0.750 g / 63.5 g / mole = 0.01118 mole.

thus

mole of HNO3 = 4 * 0.01118 mole.= 0.0472 mole.

we have

0.200 M HNO3.

volume of HNO3 = 1000 ml * 0.0472 / 0.200 = 236.2 ml (answer)

Answer 2

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