lodine is prepared both in the laboratory and commercially by adding Cl, (g) to an aqueous solution containing sodium iodide. 2 Nal(aq) + Cl,(g) → 1,(s) + 2 NaCl(aq) How many grams of sodium iodide, Nal, must be used to produce 22.6 g of iodine, I,? mass: g Nal

A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)2(aq), until no further precipitation occurs. The precipitate is collected by filtration, dried, and weighed. A total of 17.07 g PbCl2(s) is obtained from 200.0 mL of the original solution. Calculate the molarity of the Pb(NO3)2(aq) solution.

Zinc and sodium metal each react with sulfuric acid according to the following equations. Zn(s) + H, SO,(aq) ZnSO, (aq) + H,(g) 2 Na(s) + H, SO, (aq) Na, SO, (aq) + H, (g) A 25.78 g mixture of zinc and sodium is reacted with a stoichiometric amount of sulfuric acid. The reaction mixture is then reacted with 233 mL of 2.11 M barium chloride to produce the maximum possible amount of barium sulfate. Determine the percent sodium by mass in the original mixture. mass percent Na : If 86.70 mL of sulfuric acid was added, what was the concentration of the sulfuric acid? concentration: M

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese(IV) oxide. 4 HCl(aq) + MnO,(s) → MnCl, (aq) + 2 H,O(1) + Cl, (g) > A sample of 34.9 g MnO, is added to a solution containing 43.1 g HCI. What is the limiting reactant? HCl O MnO2 What is the theoretical yield of Cl, ?

For the following reaction, 72.0 grams of barium chloride are allowed to react with 64.0 grams of potassium sulfate. barium chloride(aq) + potassium sulfate(aq) →→→→→barium sulfate(s) + potassium chloride (aq) What is the maximum amount of barium sulfate that can be formed? grams What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete? grams

A chemist prepares a solution of iron(II) bromide (FeBr,) by measuring out 97.1 mg of FeBr, into a 100. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to 3 significant digits. olo mol x10 Ar

A sample of limestone and other soil materials was heated, and the limestone decomposed to give calcium oxide and carbon dioxide. CACO3 (s) → Ca0(s) + CO2 (g) A 3.043 g sample of limestone-containing material gave 1.25 g of CO2, in addition to CaO, after being heated at a high temperature. What was the mass percent of CaCO3 in the original sample?

1. A student was asked to react silver nitrate with sodium during a stoichiometry lab. The student react 12.3 g of silver nitrate with 7.83 g of sodium sulfate to produce the following products.  Na2SO4(aq) + 2 AgNO3 (aq) -> Ag2SO4(s) + 2 NaNO3(aq) a) predict the mass of percipitate that the student should obtain.

What mass of precipitate (in g) is formed when 69.0 mL of 0.500 M FeCl3 reacts with excess AgNO3 in the following chemical reaction? FeCl3(aq)+ 3 AgNO3(ag) ———> 3 AgCl(s) + Fe(NO3)3(aq)

A 1.13 g sample of an unknown bromide salt is dissolved in water. An excess of AgN 3(aq) is added, producing 1.86 g of AgBr(s) precipitate. What is the mass % of Br in the unknown salt? What is the identity of the unknown salt? You can assume the cation is from Group I or Group II.