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3 years ago

A certain solution has [H3O+] = 8.1 X 10-8 M Calculate the pH of this solution

Chemistry

1 answer:

Aleonysh [2.5K]3 years ago

3 0

Answer:

pH = 7.092

Explanation:

pH is given by the formula;

pH = - log[H3O+]

Given [H3O+] = 8.1 X 10^-8 M

Therefore;

pH = -log 8.1 X 10^-8 M

= 7.092

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2 years ago

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Ionic compounds are formed between oppositely charged ions.

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To write the empirical formula of binary ionic compound we must remember that one ion should be positive and other ion should be negative, then only the correct formula should be written. To write the empirical formula the charges of opposite ions should be criss-crossed.

First empirical formula of binary ionic compound is written between $Zn^{2+} (Positive ion)and F^{-} (Negative ion)$

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Second empirical formula is between $Zn^{2+}(Positive ion) and O^{2-}(Negative ion)$

Second Formula would be $Zn_{2}O_{2}$

Note : When the subscript are same they get cancel out, so $Zn_{2}O_{2}$ would be written as $ZnO$

Third empirical formula is between $Ni^{4+}(Positive ion) and F^{-}(Negative ion)$

Third Formula would be : $NiF_{4}$

Forth empirical formula is between $Ni^{4+}(Positive ion)and O^{2-}(negative ion)$

Forth Formula would be : $Ni_{2}O_{4}$ or $NiO_{2}$

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