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)
Added by Jay A.
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The formula to calculate the [H+] concentration from pH is [H+] = 10^(-pH). Show more…
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Adi S.
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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The $\mathrm{pH}$ of a cup of coffee $\left(\right.$ at $\left.25^{\circ} \mathrm{C}\right)$ was found to be 5.12. What is the hydronium-ion concentration?
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