Question 2.3
The pH of a hydrochloric acid solution at 25°C is 311
The concentration of the hydroxide ions in this solution is
A. [OH-] = 2 8 x 10-11 mol. dm-3
B [OII] = 3 5 x 104 mol dm3
C [OH-] = 10 x 10-7 mol dm-3
D [OH-] = 2 8 x 103 mol dm-3
E None of the above.

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.