Questions from General Chemistry

Q: Describe the preparation of a. 2.50 L of

Describe the preparation of a. 2.50 L of 0.0250 M KMnO4 from the solid reagent. b. 4.00 L of 0.250 M HClO4, starting with an 8.00 M solution of the reagent. c. 500 mL of a solution that is 0.0200 M in...

Q: What mass of solid La(IO3)3 (663.

What mass of solid La(IO3)3 (663.6 g/mol) is formed when 50.0 mL of 0.250 M La3+ is mixed with 75.0 mL of 0.302 M IO3-?

Q: What mass of solid PbCl2 (278.10 g/mol

What mass of solid PbCl2 (278.10 g/mol) is formed when 200 mL of 0.125 M Pb2+ is mixed with 400 mL of 0.175 M Cl?

Q: Find the number of millimoles of solute in a. 386

Find the number of millimoles of solute in a. 386 mL of 0.210 M HClO4. b. 25.0 L of 8.05 × 10-3 M K2CrO4. c. 4.50 L of an aqueous solution that contains 6.95 ppm of AgNO3. d. 537 mL of 0.0200 M KOH.

Q: Exactly 0.118 g of pure Na2CO3 is dissolved in 100

Exactly 0.118 g of pure Na2CO3 is dissolved in 100.0 mL of 0.0731 M HCl. a. What mass in grams of CO2 is evolved? b. What is the molar concentration of the excess reactant (HCl or Na2CO3)?

Q: Find the number of K+ ions in 1.43 mole

Find the number of K+ ions in 1.43 mole of K2HPO4?

Q: Exactly 25.0 mL of a 0.3757 M solution

Exactly 25.0 mL of a 0.3757 M solution of Na3PO4 is mixed with 100.00 mL of 0.5151 M HgNO3. a. What mass of solid Hg3PO4 is formed? b. What is the molar concentration of the unreacted species (Na3PO4...

Q: Exactly 75.00 mL of a 0.3132 M solution

Exactly 75.00 mL of a 0.3132 M solution of Na2SO3 is treated with 150.0 mL of 0.4025 M HClO4 and boiled to remove the SO2 formed. a. What is the mass in grams of SO2 that is evolved? b. What is the co...

Q: What mass of MgNH4PO4 precipitates when 200.0 mL of a

What mass of MgNH4PO4 precipitates when 200.0 mL of a 1.000% (w/v) solution of MgCl2 is treated with 40.0 mL of 0.1753 M Na3PO4 and an excess of NH4+? What is the molar concentration of the excess rea...

Q: Identify the acid on the left and its conjugate base on the

Identify the acid on the left and its conjugate base on the right in the following equations: