A 0.115 M solution of a weak acid (HA) has a pH of 3.26. Calculate the acid ionization constant (Ka) for the acid.

The pH of an aqueous solution of 0.494 M morphine (a weak base with the formula C₁7H1903N) is

Determine the pH of a solution of a weak acid (HA) that is 0.17 M. The Ka of the weak acid is 7.5 x 10-5

Define pH in words. The strong acid HClaq has a pH value of 1, use the following equation for a strong acid:   HClaq        à               H+aq     +          Cl-aq   and convert the following expression to deduce the hydrogen ion concentration:   pH = -log10 [H+]     (ii) Use the above expression to deduce the pH of HCl (aq) given the concentration of the acid to be 4.5 mol/dm3

A chemist dissolves 350. mg of pure sodium hydroxide in enough water to make up 100. mL of solution. Calculate the pH of the solution. (The temperature of the solution is 25 °C.) Be sure your answer has the correct number of significant digits.

A chemist dissolves 818. mg of pure potassium hydroxide in enough water to make up 150. mL of solution. Calculate the pH of the solution. (The temperature of the solution is 25 °C.) Be sure your answer has the correct number of significant digits. Ox10

A chemist dissolves 744. mg of pure hydrochloric acid in enough water to make up 250. mL of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant digits.

Calculate the acid ionization constant (Ka) for the acid.

Hypochlorous acid, HOCl, is a weak acid having a pKa = 7.46. (a) Show the balanced chemical equation for the hydrolysis of water by OCl- (aq).  (b) Compute the value of pKb for aqueous hypochlorite ion.  (c) If [OCl-] = 0.050 M, then what is the pH of this aqueous solution? (a)     (b)     (c)

Acidity of a solution is determined by the concentration H of hydrogen ions in the solution (measured in moles per liter of solution). Chemists use the negative of the logarithm of the concentration of hydrogen ions to define the pH scale, as shown in the following formula. pH = -log (H) Lower pH values indicate a more acidic solution. (a) Normal rain has a pH value of 5.6. Rain in the eastern United States often has a pH level of 3.8. How much more acidic is this than normal rain? (Round your answer to two decimal places.) 63.10 times as acidic as normal rain (b) If the pH of water in a lake falls below a value of 5, fish often fail to reproduce. How much more acidic is this than normal water with a pH of 5.6? (Round your answer to two decimal places.) * times as acidic as normal water