
- A 100-0 g sample of barium carbonate is added to a container containing 250 mL...
A 250-g sample of copper is heated to 100∘C and placed into a cup containing 370 g of water initially at 30.0∘C. Ignore the container holding the water, assume no heat is lost or gained to the environment. Find the final equilibrium temperature of the copper and water. (Express your answer to two significant figures.)
Solid potassium carbonate is slowly added to 125 mL of a 0.0567 M barium acetate solution. The concentration of carbonate ion required to just initiate precipitation is____M.
Solid barium acetate is slowly added to 75.0 mL of a 0.0376 M ammonium chromate solution. The concentration of barium ion required to just initiate precipitation is ____ M. Solid barium sulfate and solid barium carbonate are in equilibrium with a solution containing 1.43×10-2 M potassium carbonate. Calculate the concentration of sulfate ion present in this solution. [sulfate] = _____ M.
A) Solid barium nitrate is slowly added to 125 mL of a 0.0651 M potassium carbonate solution. The concentration of barium ion required to just initiate precipitation is ______ M. Ksp: BaCO3 8.1 × 10-9 B) Solid ammonium chromate is slowly added to 75.0 mL of a 0.0392 M calcium nitrate solution. The concentration of chromate ion required to just initiate precipitation is ______ M. Ksp: CaCrO4 7.1 × 10-4
A student weighs out a 3.07 g sample of NiF2, transfers it to a 250. mL volumetric flask, adds enough water to dissolve it and then adds water to the 250. mL tick mark. What is the molarity of nickel(II) fluoride in the resulting solution?
a. The solubility of potassium hydrogen carbonate (KHCO3) (100.115 g/mol) in water is 33.7 g/100 mL at 20 oC. Assuming no change in the volume of the water, what is the concentration of a saturated KHCO3 solution at 20 oC? [KHCO3] = ____ M b. How many grams of KHCO3 can be dissolved in 196.5 mL of water at 20 oC?
34. A 122 mL sample of water at 97°C is added to a beaker containing 255 mL of water at 23.0°C. Calculate the final temperature of the water. The density of water is 1.00 g/mL.
0.1081 g of an unknown compound containing CO3^2- was added into 50 mL of distilled water. It took 14.05 mL of 0.1 M HCl to reach equivalence point 2 from titration. What is the percent carbonate CO3^-2 of the unknown compound?
A 21.524 g paint sample was analyzed for barium (Ba2+, MW = 137.327 g/mole) by an EDTA back titration: Ba2+(aq) + Y4–(aq) à BaY2–(aq). The sample was dissolved in acid and sufficient water was added to produce a volume of 100 mL. 10.00 mL of this concentrated solution was diluted to a volume of 50.00 mL. 25.00 mL of the diluted solution was treated with 33.95 mL of excess 0.09456 M EDTA. The excess EDTA was titrated to the endpoint...
A student placed 200 g of glucose (C6H12O6 ) in a volumetric flask added enough water to dissolve the glucose by shirting then carefully added additional water until the 100 mL mark on the neck of the flask has reached The flask was then shaken until the solution was uniform A 40.0 mL sample of this glucose solution was diluted to 0.500 L How many grams of glucose are in 100 mL of the final solution?)