What is the mass in grams of copper chloride dihydrate (CuCl2Â·2H2O) required to prepare 80.0 mL of a 0.10 M CuCl2 solution?

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Reid WolffLv2

27 Jul 2019

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BaCl₂ has a formula weight of 208.2 g/mol. A 1.23 g sample was dissolved into 100.0 mL of solution. What was the (molar and ppm) concentration of Ba²⁺ and Cl^- ?

BaCl₂ is 65.95% Ba by mass (Ba = 137.3). So thatâs 1.23 g BaCl₂ * 65.95% Ba = 0.811383 g Ba. (Keep more significant figures than we should, because weâve got more to do.) The concentration in ppm is simply 8,111 ppm. In molarity, itâs 0.811383 g / 137.3 g/mol, divided by 0.1 L of solutionâ¦ 0.0590778 M. We had 3 s.f. originally, so thatâs only 0.0591 M.

The (molar) concentration of Cl^- is twice that of Ba²⁺, so we multiply 0.0591 * 2 and get 0.118 M. How many ppm is that? 0.118 mol/L * 35.5 g/mol = 4.194524 g/L, 4194.524â¦ Î¼g/mL, = 4,190 ppm.

6a) Quinine sulfate dihydrate contains two equivalents of quinine molecules (324.4 g/mol). 37.2 mg of quinine sulfate dihydrate (782.94 g/mol) was dissolved in 250.0 mL of dilute sulfuric acid. Calculate the molar concentration of quinine in the solution.

6b) Copper chloride is also typically seen as the dihydrate, CuCl₂â2H₂O, FW 170.48 g/mol. What is the molar concentration of copper in a solution prepared by dissolving 1.324 g of this substance in 250.0 mL of water?

1. How muchn oxalic acid dihydrate, in grams, (COOH)2*2H2O, isneeded to prepare 1500 mL of a 0.200 M solution? (show work)

Calculate the molar mass of Calcium chloride dihydrate: CaCl₂. 2H₂O

Calculate the moles of Calcium chloride dihydrate: Cl₂. 2H₂O by taking the mass from line 1 of the data table and dividing by the molar mass just found above. Report his value into line 2 of the data table.

Thus, in 1.0 grams of Calcium chloride dihydrate: CaCl₂. 2H₂O, the same number of moles of the anhydrous form are available to react. Record this same mole number into line 3 of your data table also.

A computed data set is given below: