2. A 0.500 g sample of pure CaCO3 is dissolved in water to which 50.00 mL of HCl solution has been added. The solution then requires 6.20 mL of NaOH solution of which 1.000 mL = 1.010 mL of the HCl solution. What is the normality of each of the two solutions?
0.5×50= 25
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