Using some of the following reagents, describe the preparation of 500 ml, ph 7 citric acid
1.8 m citric acid
1.2 m sodium dihydrogen citrate
1.5 m sodium hydrogen citrate
0.8 m sodium citrate
0.1 m hcl
0.1 m naoh
citric acid: ka1=7.4 x 10-4, ka2=1.7 x 10-5, ka3=4.0 x 10-7