The structure of benzoic acid is shown below. OH pka = 4.2 If one chose to recrystallize this compound from water would pH make a difference in the effectiveness of the recrystallization. Explain using words and pictures.

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.