Lactic acid is a weak acid found in milk. its calcium salt is a source of calcium for growing animals. a saturated solution of this salt, which we can represent as ca(lact)2, has a [ca2 + ] = 0.26 m and a ph = 8.78. assuming the salt is completely dissociated, calculate the ka of lactic acid!

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

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