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Chemistry

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Nannie Keeling

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Cards in this guide (5)
What is KB for cn- aq h2o l hcn aq oh-aq

Kb=[HCn][OH-]

[CN-]

How many hydrogen ions in a solution with a pH of 4.0

pH = -log[H+] Hence [H+] = 10^-pH = 10^-4 = 1 x 10^-4 mole of H+

Now 1 mole of H+ = 6.022 x 10^23. Hence 1 x 10^-4mole = 6.022 x 10^19 H+ ions.

What is Ka for HCN aq H aq CN aq

Ka = [H+][CN-]

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[HCN]

How can one tell if a reaction has reached its equilibrium

All motion ceases

According to the rate law how do concentrations affect rate

The rate increases as concentrations increase.

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