Question

Calculate the ratio of H+ ions to OH– ions at a pH = 7. Find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide. Then divide the H+ concentration by the OH– concentration. Record this calculated ratio in Table A of your Student Guide.

Compare your approximated and calculated ratios of H+ ions to OH– ions at a pH = 7. Are they the same? Why or why not? Record your comparison in Table A.

What is the concentration of H+ ions at a pH = 7?

mol/L

What is the concentration of OH– ions at a pH = 7?

mol/L

What is the ratio of H+ ions to OH– ions at a pH = 7?

:1

Answer 1

Explanation:At a pH of 8, the concentration of H+ ions is 10^-8 M and that of OH- ions is 10^-6 M. The ratio of H+ ions to OH- ions is 0.01, implying that for every 1 H+ ion, there are 100 OH- ions.Explanation:The pH of a solution is a measure of its acidity or basicity. pH = 8 indicates a slightly basic solution. In relation to the concentrations of H+ ions and OH- ions, the pH and pOH of a solution are related by the equation pH + pOH = 14 at 25°C. Therefore, the pOH of this solution is 14 - 8 = 6.The concentration of H+ ions can be calculated using the formula [H+] = 10^-pH = 10^-8 M. The concentration of OH- ions can be calculated using the formula [OH-] = 10^-pOH =10^-6 M.The ratio of H+ ions to OH- ions can thus be calculated by [H+]/[OH-] = 10^-8/10^-6 = 1/100 = 0.01. This means at a pH of 8, for every 1 H+ ion, there are 100 OH- ions.