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victus00 [196]
3 years ago
14

What are the four main sources of fresh water on earth

Chemistry
1 answer:
Anvisha [2.4K]3 years ago
6 0
Glaciers, groundwater, streams are three of them
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For hydrocyanic acid, HCN, Ka = 4.9 × 10-10. Calculate the pH of 0.20 M NaCN. What is the concentration of HCN in the solution?
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By using the ICE table :

initial    0.2 M            0           0
change -X                 + X           +X
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so by substitution:

4.9x10^-10 = X^2 / (0.2-X) by solving this equation for X 
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