Question
Calculate the pH of(a) black coffee, $5.0 \times 10^{-5} \mathrm{M} \mathrm{H}^{+}$(b) limewater, $3.4 \times 10^{-11} \mathrm{MH}^{+}$
Step 1
Step 1: To calculate the pH of a solution, we use the formula: \[ \text{pH} = -\log[\mathrm{H}^+] \] where \([\mathrm{H}^+]\) is the concentration of hydrogen ions in moles per liter (M). Show more…
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Calculate the [H+] for (a) black coffee with a pH of 4.21 (Enter your answer as follows: 1.0E-2 for 0.010) (b) black tea with a pH of 6.58 (Enter your answer as follows: 1.0E-2 for 0.010) (c) green tea with a pH of 7.40 (Enter your answer as follows: 1.0E-2 for 0.010) (d) laundry detergent with a pH of 9.61 (Enter your answer as follows: 1.0E-2 for 0.010)
use the following information on $\mathrm{pH}$. Chemists define $p H$ by the formula $p H=-\log _{10}\left[\mathrm{H}^{+}\right],$ where $\left[\mathrm{H}^{+}\right]$ is the hydrogen ion concentration measured in moles per liter For example, if $\left[\mathrm{H}^{+}\right]=10^{-5},$ then $p H=5 .$ Solutions with a pH of 7 are said to be neutral; a pH below 7 indicates an acid; and a pH above 7 indicates a base. (A calculator is helpful for Exercises 53 and 54 .) What is the hydrogen ion concentration for black coffee if the $\mathrm{pH}$ is $5.9 ?$
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