Dissolve the required amount of tartaric acid powder to make 1 liter of a 1M solution. Add just enough distilled water to dissolve all the powder, making sure that the final volume is less than 1 liter. Take the pH - it should be lower than 4.2 (since the pKa of tartaric acid is around 3.0). Titrate this solution with a strong base (e.g., 1M NaOH solution) to raise the pH to 4.2 (on a stir plate with the stirrer on). Once the desired pH is reached, stop the titration and note the volume of the solution -- it should still be less than 1 liter. Add enough distilled water to make the final volume of the solution to 1 liter. (The pH should stay at 4.2 even after he addition of distilled water to make 1 liter, since it is a buffered solution.) Voila, you have 1 liter of a 1 M solution of tartaric acid at pH 4.2.

Thank you sir :)

Hello dear Dr. Vicente, could you please provide me with the reference?

Vielen Dank!

Hello Mr. Mansour, I do not have a reference; that is just the way weak acid buffers are made. The procedure is similar for making weak base buffers, only you have to titrate with a strong acid to lower the pH to the desired value. Du bist Willkommen. Chemie ist grossartig.

Vielen Vielen Dank Dr. Reyes :) !!

Depending on the acid concentration and one of the salts available to comprise mixed

Tartaric acid (M.W. = 150.09) .......................... 2.5 mmol (0.375 g)

Sodium tartrate dihydrate (M.W. = 230.08) ........ 7.5 mmol (1.726 g)

Add water to make up to 1 L.

Thanks

Many thanks for answer, can anyone also helps in making 10% Tartaric acid from the stock solution which I assume the concentration should be higher? should I just dissolve 100 gram of powder in 1000 beaker and adjust the pH. This gives me 10 % Tartaric acid ? as I calculated the Molarity should be 0.66.