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

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na, so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g