Chemistry/Making Buffers

PREPARATION OF BUFFER SOLUTIONS
Dilute each of the mixtures to 1 L with distilled water. (NOTE: the pH will not be affected if the volumes are slightly more or less than 1 L.)

IMPORTANT: The pH of each buffer must be checked and adjusted before being bottled.
 * If the pH is too high, adjust the pH to the correct value by adding 1 M HCl, with stirring.
 * If the pH is too low, adjust the pH to the correct value by adding 1 M NaOH, with stirring.