Chemistry Homework Help

Browse Homework Solutions

164 solutions

Solution Stoichiometry

Q. A 0.100 M solution of K2SO4 would contain the same total ion concentration as which of the following solutions? a) 0.0800 M Na2CO3 b) 0.100 M NaCl c) 0.0750 m Na3PO4 d) 0.0500 M NaOH

Solved • Apr 13, 2020

Solution Stoichiometry

Q. When solutions of silver nitrate and magnesium chloride are mixed, silver chloride precipitates out of solution according to the equation 2AgNO3(aq)+MgCl2(aq) → 2AgCl(s) + Mg(NO3)2(aq) What mass of silver chloride can be produced from 1.19 L of 0.254 M solution of silver nitrate? Express your answer with the appropriate units. The reaction described in Part A required 3.74 L of magnesium chloride. What is the concentration of this magnesium chloride solution? Express your answer with the appropriate units.

Solved • Apr 13, 2020

Solution Stoichiometry

Q. What is the concentration of K^+ in 0.15 M of K2S? Express your answer to one decimal place and include the appropriate units.

Solved • Apr 13, 2020

Solution Stoichiometry

Q. What is the concentration of K^+ ions in a 0.025 M K2CO3 solution assuming complete dissociation? Express the concentration in molarity.

Solved • Apr 13, 2020

Solution Stoichiometry

Q. A 1.2516 gram sample of a mixture of CaCO3 and Na2SO4 was analyzed by dissolving the sample and completely precipitating the Ca+2 as CAC2O4 was dissolved in sulfuric acid and resulting H2C2O4 was titrated with a standard KMnO4 solution. The titration of the H2C2O4 obtained required 35.62 milliliters of 0.1092 molar MnO4 solution. Calculate the number of moles of H2C2O4 that reacted with the MnO4. Calculate the number of moles of CaCO3 in the original sample. Calculate the percentage by weight

Solved • Apr 11, 2020

Solution Stoichiometry

Q. A 56.0 mL sample of a 0.118 M potassium sulfate solution is mixed with 39.5 mL of a 0.104 M lead(II) acetate solution and the following precipitation reaction occurs: K2SO4(aq) + Pb(C2H3O2)2 (aq) → 2KC2H3O2(aq) + PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 0.992 g. Determine the theoretical yield.

Solved • Mar 13, 2020

Solution Stoichiometry

Q. The mass percentage of chloride ion in a 21.00 mL m L sample of seawater was determined by titrating the sample with silver nitrate, precipitating silver chloride. It took 42.22 mL m L of 0.2992 M M silver nitrate solution to reach the equivalence point in the titration. What is the mass percentage of chloride ion in the seawater if its density is 1.025 g/mL g / m L ?

Solved • Mar 26, 2020