How much NaH2PO4(s) and Na2HPO4(s) is needed to reach a target pH of 7.00 and target concentration is 0.15. The Ka for H2PO4- is 6.23*10^-8 and the pKa for HPO42- is 7.21.
1. Using the Henderson-Hasselbalch Equation, determine the ratio of (moles A-)/(moles HA).
2. Based on the target concentration and the total volume of your solution, what is the total number of moles in your solution?
3. What are the moles of HA in your solution?
4. What are the moles of A- in your solution?
5. Input the mass (in grams) or volume (in mL) of acid that you will use to make your buffer.
6. Input the mass (in grams) or volume (in mL) of base that you will use to make your buffer.