What is the mass of CaCl2•2H2O (MW 147.02) in grams needed to prepare 1.0E+02 mL of...

Question

Question

What is the mass of CaCl2•2H2O (MW 147.02) in grams needed to prepare 1.0E+02 mL of a 0.4300 M solution of Ca2+ (MW 40.078)?

science chemistry

Answer 1

Answer #1

MMoles = molarity * volume ( in L )

= 0.4300*1.0*10^2

= 43

CaCl2.2H2O = Ca2+ + 2 Cl- + 2 H2O

MMoles of Ca2+ = moles of CaCl2.2H2O

= 43

Mass = mmoles * molar mass *10^-3

= 43 * 147.02*10^-3

= 6.322 grams

If you have any questions please comment

If you satisfied with the solution please rate it thanks

Answer 2

Similar Homework Help Questions

10. What is the mass of CaCl2•2H20 (MW 147.02) in grams needed to prepare 2.0E+02 ml....

10. What is the mass of CaCl2•2H20 (MW 147.02) in grams needed to prepare 2.0E+02 ml. of a 0.4000 M solution of Ca2+ (MW 40.078)? O 0.312 11.8 O 0.3119 O 0.0850 • 11.76 O 0.04990 Submit Answer Incorrect. Tries 1/2 Previous Tries This discussion is closed.
Please calculate these two problems. 11. What mass of KCI (MW 74.5513) in grams is needed...

Please calculate these two problems. 11. What mass of KCI (MW 74.5513) in grams is needed to prepare 100 mL of a 1.6 M solution of KCI? O 11.9 O 0.084 O 6.41 6.412 O 12 0.1559 Submit Answer Incorrect. Tries 1/2 Previous Tries This discussion is closed. wwww.du 10. What is the mass of CaCl2 2H20 (MW 147.02) in grams needed to prepare 2.0E+02 mL of a 0.4000 M solution of Ca2 (MW 40.078)? O 0.312 O 11.8 O...
What mass of KCl (MW 74.5513) in grams is needed to prepare 100 mL of a 1.3 M solution of KCl?

What mass of KCl (MW 74.5513) in grams is needed to prepare 100 mL of a 1.3 M solution of KCl?

What mass of H2C2O4 * 2H2O is needed to prepare 1.00 x 10^2 mL of a...

What mass of H2C2O4 * 2H2O is needed to prepare 1.00 x 10^2 mL of a 0.0200M solution? The molar mass of H2C2O4 * 2H2O is 126.
A sample of CaCl2⋅2H2O/K2C2O4⋅H2O solid salt mixture is dissolved in ~100 mL de-ionized H2O. The oven...

A sample of CaCl2⋅2H2O/K2C2O4⋅H2O solid salt mixture is dissolved in ~100 mL de-ionized H2O. The oven dried precipitate has a mass of 0.233 g. The limiting reactant in the salt mixture is K2C2O4⋅H2O. CaCl2⋅2H2O(aq) + K2C2O4⋅H2O(aq) --> CaC2O4⋅H2O(s) + 2KCl(aq) + 2H2O(l) starting material (SM) product Molar Mass (MM) g/mol: CaCl2⋅2H2O = 147.02 K2C2O4⋅H2O = 184.24 CaC2O4 = 128.10 Determine Mass ofK2C2O4⋅H2O(aq) in Salt Mixture in grams. Answer to 3 places after the decimal and include unit, g Do calculation all at once,...
A solution is prepared by adding 0.5630 g of powdered milk into a 2.5E+02 mL volumetric flask and adding 30 mL of 1.0 M...

A solution is prepared by adding 0.5630 g of powdered milk into a 2.5E+02 mL volumetric flask and adding 30 mL of 1.0 M KCL and diluting to volume with DI water. The concentration of a milk sample is determined to be 6.420×10-4 M Ca2+ based on linear regression analysis of calcium standard solutions. What is the concentration of Ca2+ in the milk sample (wt/wt %)? [MW Ca = 40.078 g/mole]

How many grams of CaCl2 are needed to make 853.6 g of a solution that is...

How many grams of CaCl2 are needed to make 853.6 g of a solution that is 31.0% (m/m) calcium chloride in water? Note that mass is not technically the same thing as weight, but (m/m) has the same meaning as (w/w). How many grams of water are needed to make this solution? What is the volume percent % (v/v) of an alcohol solution made by dissolving 109 mL of isopropyl alcohol in 741 mL of water? (Assume that volume are...
You wish to prepare 100.0 mL of a 325.0 ppm w/v sodium (MW = 22.9897 g/mol)...

You wish to prepare 100.0 mL of a 325.0 ppm w/v sodium (MW = 22.9897 g/mol) solution. How many grams of sodium dichromate dihydrate (Na2Cr2O7·2H2O, MW = 297.998 g/mol) are needed to prepare this solution? Assume the final solution has a density of 1.00 g/mL.
MW molewo one expand 4. a) Calculate the mass of NaCl needed to prepare 35.0 mL...

MW molewo one expand 4. a) Calculate the mass of NaCl needed to prepare 35.0 mL of a 0.90% w/v Naci solution b) Calculate the mass of NaCl needed to prepare 35.0 mL of a 20.0 % wly NaCl solution. c) Describe how you would make the solution for 4a. Be brief, but quantitative, in your answer.

How many grams of CaCl2 are needed to make 610.3 g of a solution that is...

How many grams of CaCl2 are needed to make 610.3 g of a solution that is 36.5% (mm) calcium chloride in water? Note that mass is not technically the same thing as weight, but (m/m) has the same meaning as (w/w). Number g Cac How many grams of water are needed to make this solution? Number b) What is the volume percent % v/ alcohol in 739 mL of water? (Assume that volumes are additive.) of an alcohol solution made...