Question

why HCL reacts with HNO3 in ratio 3:1

Answer 1

a mixture of concentrated HCl and HNO3 in the ratio of 3:1 is called as aqua regia

Answer 2

Because concentrated HCL is about 35 percent, while concentrated HNO3 is about 65 percent, so the volume ratio is usually 3 parts concentrated HCL and 1 part concentrated HNO3(Nitric acid).

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