Question

continued If you have ever peeled the label off of a glass jar, you may have noticed that the gue does not easily wash off with water. However, it can be easily removed with another common household solvent-fingernail polish remover (ethyl acetate). What does this tell you about the chemical composition of the gue? Explain your answer. 13 A solution is prepared by dissolving 10.98 g of MgCl, in 646 mL of water. The total mass of the solution is 656.98 g. and the total volume is 651 mL. a What is the mass-mass percent concentration of Mace. In the solution? Show your work. b What is the mass volume percent concentration of MgCl, in the solution? Show your work. c What is the molarity of the MgCl, in the solution? Show your work. Lab 15 . All about Solution

Answer 1

12) Ethyl acetate is non-plar and glue is non-plar.So that, glue is soluble in ethylacetate.Hence it can be easily removed.

13)

a) mass-mass percent

mass of MgCl2(solute) = 10.98 g

mass of solution       = 656.98 g

    %(m/m) = mass of solute/mass of solution*100

           = 10.98/656.98*100

           = 1.67%

b)
mass of MgCl2(solute) = 10.98 g

volume of solution   = 651 ml

    %(m/v) = mass of solute/volume of solution*100

           = 10.98/651*100

           = 1.69%

c) Molarity(M) = %(m/v)*10/m.m

%(m/v) = 1.69%

    m.m = molarmass of MgCl2 = 95.2 g/mol

   Molarity(M) = 1.69*10/95.2

               = 0.18 M