An impure sample of sodium sulfate was dissolved in deionized water and titrated with 0.281 M barium chloride. If 34.65 mL of the barium chloride were required to completely precipitate the sulfate, how many grams of sodium sulfate were there in the original sample? Na2SO4(aq) + BaCl2(aq) BaSO4(s) +2 NaCl(aq)

Imagine a small synthetic vesicle made from pure phospholipids enclosing an interior lumen containing 1 mm glucose and 1 mm sodium chloride. if the vesicle is placed in pure water, which of the following happens faster? a. na+ diffuses out. b. cl– diffuses out. c. h2o diffuses in. d. glucose diffuses out. e. sodium chloride diffuses out.