Question

# Use the data in Table to answer the following questions. pH values.$\begin{matrix} \text{Substance} & \text{pH}\\ \text{Household ammonia} & \text{11.3}\\ \text{Lemon juice} & \text{2.3}\\ \text{Antacid} & \text{9.4}\\ \text{Blood} & \text{7.4}\\ \text{Soft drinks} & \text{3.0}\\ \end{matrix}$Which has a concentration of $\mathrm{H}^{+}=4.0 \times 10^{-10} \mathrm{M} ?$

Solution

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$pH=-log[H^+]$ $pH=-log[4.0 \times 10^{-10}]$ pH=9.4 Since Antacid has a pH=9.4, Antacid has $[H^+]=4.0 \times 10^{-10} M$.

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