Which ion could be used to precipitate Ba2+ from a solution of Ba(NO3)2? 1) Sr²+ 2) CIO4 3) SO4²- 4) OH O 3 02 0 1 04

You are preparing standard acid and base solutions for the laboratory, using potassium hydrogen phthalate (KHC₈H₄O₄, abbreviated KHP) as the primary standard. KHP (molar mass = 204.22 g/mol) has one acidic hydrogen. You prepared solutions of both NaOH and HCl. It took 22.65 mL of the NaOH solution to titrate (react exactly with) 1.55 g KHP. It then took 32.35 mL of HCl solution to titrate 25.00 mL of the NaOH solution. What is the molarity of the HCl solution?

A solution contains 9.47×10-3 M nickel(II) acetate and 1.27x10-2 M zinc nitrate. Solid potassium hydroxide is added slowly to this mixture. What is the concentration of zinc ion when nickel ion begins to precipitate? [Zn²*]= M Retry Entire Group 8 more group attempts remaining Submit Answer 券

Which of the following cation/anion combinations will form a precipitate in solution? A)Na3PO4 B)Sr(OH)2 C)RbCO3 D)AgC2H3O2 E)SrCO3