Question

In: Chemistry

Calculate the molarity of the following: (a) 90 mg/L HNO3, (b) 150 mg/L CaCO3,

Calculate the molarity of the following: (a) 90 mg/L HNO3, (b) 150 mg/L CaCO3,

Solutions

Expert Solution

a)

90 mg / L HNO3

90 mg / L = 90 x 10^-3 g / L

                = ( 90 x 10^-3 g / L ) / (63 g /mol )

                = 1.43 x 10^-3 mol / L

               = 1.43 x 10^-3 M

b)

150 mg / L = 150 x 10^-3 g / L

                  = 0.150 / 100

                 = 1.5 x 10^-3 M


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