What mass of HClO_{4} should be present in 0.556 L of solution to obtain a solution with each pH value?
1. Answer is 0.189gm for a ph value of 2.47
[H+] = 10^-2.47 =0.00338 M
moles HClO4 = 0.00338 x 0.556 L =0.00188Mass HClO4 = 0.00188 x 100.461 g/mol =0.189g
2. Answer is 1.89gm for a ph value of 1.47
[H+] = 10^-1.47 =0.03388 M
moles HClO4 = 0.03388 x 0.556 L =0.01884
Mass HClO4 = 0.01884 x 100.461 g/mol =1.893g
3. Answer is 18.93 gm for a ph value of 0.47
[H+] = 10^-0.47 =0.3388 M
moles HClO4 = 0.3388 x 0.556 L =0.1884
Mass HClO4 = 0.01884 x 100.461 g/mol =18.93g
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