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When 85.00 mL of 0.250 M Ca(OH)2 (aq) and 15.00 mL of 0.750 M Pb(NO3) (aq) are mixed together in a beaker a yellow precipitate is formed. Assume all heavy metal hydroxides are insoluable. Assume that both solutions are initially at 25® C and the final volume of the solution is 0.100 L. (a) What is the net ionic equation for the reaction that occurs? (b) What is the limiting reactant in this reaction? (c) What is the theoretical yield in grams of the precipitate in your reaction? What is the percent yiteld if 2.00 g of the precipitate is produced during an experiment? (d) Given that ?H ®F for the precipitate is +71.50 KJ/mole, calculate the quantity of heat released or absorbed during the reaction. (e) Will the temperature of the solution increase or decrease as the reaction occurs? EXACTLY what will the temperature change be?
A saturated solution of calcium hydroxide contains .38 grams of calcium hydroxide in each 250 mL of solution. What is the pH of the saturated calcium hydroxide?
At a higher temperature, 373K, dinitrogentetraoxide partially decomposes according to the same equilibrium reaction but with slightly different results. The chemical equation is again
Ozonolysis of C followed by treatment with Zn and water gives CH3CHO and compound D (C9H10O). The proton NMR spectrum of compound D is given below. Treatment of compound D with ethyl magnesium bromide yields A. Draw the structures of compounds A, ..
The equilibrium constant, Kp , for the reaction CO(g) + H2O(g)-> CO2(g) + H2(g) at 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor
Calculate the pH of a solution that is 1.00 M HNO2 and 1.00 M NANO2
2I2 + N2H4 → 4HI + N2 a. How many grams of I2 are needed to react with 36.7 g of N2H4?
Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A reading of 276 units was obtained for the intensity of the 671 nm red emission line
Olive oil is comprised of 80% oleic acid, CH3(CH2)7CH=CH(CH2)7COOH. How many molecules of acetyl CoA are produced by catabolism of oleic acid
Calculate the pH of the solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M HCN (Ka = 4.9 × 10^-10) solution.
If the total mass of CO2 produced is 33.5 grams, what was the approximate mass of the methane in the original mixture?
The reaction of barium metal with liquid water produces 660.2 kJ of heat for every mole of barium that reacts. One of the products is barium hydroxide.
Epsom salt is a hydrate with a formula MgSO4*X H2O, where x indicates the number of moles of H2O per mole of MgSO4, After a 1.687 g sample of the hydrate is heated, 0.824 of MgSO4 remains. How many molecules of water are present per formula unit o..
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