A solution is prepared from an unknown solid containing Ni and Cu by dissolving 5.2832 grams of the solid in nitric acid to release Ni2* and CuR*. The nitric acid is neutralized and the solution diluted to 200.0 mL. Next excess sodium carbonate is added to the solution to form Ni and Cu carbonates with a total mass of 2.5305 grams. The precipitate is then ignited to form NiO and CuO with a total mass of 1.6126 grams.

You have been given a vinegar solution that is made of water and an unknown concentration (M) of acetic acid. Acetic acid is a monoprotic acid which reacts with NaOH in a 1:1 mole ratio. You have access to a premade NaOH solution of unknown concentration (M), potassium hydrogen phthalate (KHP) and an phenolphthalein indicator as well. Using whatever necessary glassware that would be available to you in the general chemistry lab, design an experiment to determine the Molarity concentration (M), and appropriate statistics, of the acetic acid in the vinegar solution. Write the procedure, including specific glassware, measurements, and calculations in a bulleted or numbered list.

A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO,),(aq), until no further precipitation occurs. The precipitate is collected by filtration, dried, and weighed. A total of 18.42 g PbCI, (s) is obtained from 200.0 mL of the original solution. Calculate the molarity of the Pb(NO,),(aq) solution. concentration: Question Source: MRG - General Chemistry Publisher: University Science Books

A compound containing barium (Ba) and oxygen, weighed 2.018 g, was dissolved to produce barium ions in solution. The barium ions are then separated from the solution by precipitating method. The precipitate formed was 3.018 g of BaCrO4. Determine the chemical formula of the compound.

An impure sample of KHP had a mass of 1.520 g, It was dissolved in titrated with 38.5 ml of 0.155 M NaOH solution. Calculate the % putity.

3. You have dissolved 5 g of a rock containing a mixture of calcium carbonate and inert sand in 100 mL of 1 mol L-1 HCI. You measure the calcium concentration of the resulting solution as 0.03 mol L-1 in that 100 mL solution. Calculate the percentage calcium carbonate by weight in the rock sample.

0.8888 g a mixture contains calcium chloride and potassium nitrate. To determine the % of each compound, silver nitrate was added to these solutions to precipitate all the chlorine in a form of silver chloride. 1.885 grams of silver chloride was precipitated, washed and dried. Calculate the % of calcium chloride in the sample.

A 185.0 mL sample of 1.200 M Pb(NO₃)₂ is mixed with 52.50 mL of 1.500 M NaCl, and the PbCl₂ precipitate is filtered from the solution. Then 200.0 mL of 3.000 M NaBr is added to the remaining solution, and the PbBr₂ precipitate is also collected and dried. What is the mass (in grams) of the PbBr₂ precipitate, assuming the yield in each precipitation step is 100%?

A 185.0 mL sample of 1.200 M Pb(NO₃)₂ is mixed with 97.50 mL of 1.500 M NaCl, and the PbCl₂ precipitate is filtered from the solution. Then 200.0 mL of 3.000 M NaBr is added to the remaining solution, and the PbBr₂ precipitate is also collected and dried. What is the mass (in grams) of the PbBr₂ precipitate, assuming the yield in each precipitation step is 100%?

2) Determine the molarity of a solution formed by mixing 8.56 g KIO; with sufficient water to obtain a total volume of 2000. mL.