Water can be made using the reversible reaction shown. Which change would keep this reaction from shifting to form more of the product?
2H2 + O2 = 2H20 + energy
A. Increasing the temperature in the reaction vessel
B. Increasing the concentration of H2 gas in the reaction vessel
C. Decreasing the temperature in the reaction vessel
D. Removing the H20 from the reaction vessel as it forms

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.