Citric acid is one component of some soft drinks. Suppose that 2.00 L of solution are made from 150. mg of citric acid, C6H8O7. a. What is the molar mass of citric acid? b. What is the molarity of citric acid in the solution? 3
Combining aqueous solutions of BaI2 and Na2SO4 affords a precipitate of BaSO4. Which ion(s) is/are spectator ions in the reaction BaI 2aq) + Na 2O (4q) BaSO (s)4+ NaI(aq) Spectator Ions Na + I + How many moles of K+ are present in 343 mL of a 1.27 M solution of K3PO4 + Moles K 343 mL of 1.27 M K PO 3 4 0.343L 1.27moles 3 molesK ❑ * * = 1.31 moles K ❑ L 1 moleK 3 PO 4 ❑ The molarity of a solution prepared by diluting 43.72 mL of 1.005 M aqueous K2Cr2O7 to 500. mL M Diluting 43.72mL of 1.005 M K Cr O 500 Ml 2 2 7 M 1V 1 (1.005M)(43.72mL) V2 =M2
