Question

4. The unknown x is in units of Molar. Given the volume from the beginning, how many moles of NaOH would this be? 5. Calculate how many mL of a 1 M NaOH solution you would need for the number of moles calculated in the previous question. When making a buffer using two solutions conjugate base - the calculations are very similar. one of the conjugate acid, one of the You are to make 100.0 mL of a 0.50 M acetate buffer (pKa 4.72) @ pH 5.00 using 0.50 M stocks of acetic acid and sodium acetate 6. Using Henderson-Hasselbalch and the information given, calculate the value of [A]/ HAJ. 7. Reuse the equation from question 3, but in place of Conc, use the final volume (100 mL) of the solution. The unknown (x) is now the volume of base form we need to add. Using [A]/ [HA] calculated in question 6 and the equation shown, solve for x 8. If the final volume is the total of the acid and base solutions, how many mL of the acid form do you need to combine with the base form in the previous question? Compare what you get in this question to the appropriate value in the table on p. 27 23