1.-A 0.972-g sample of aCaCl 2 . 2H 2 O/K 2 C 2 O 4 . H 2 Osolid salt mixture is
ID: 788310 • Letter: 1
Question
1.-A 0.972-g sample of aCaCl2.2H2O/K2C2O4.H2Osolid salt mixture is dissolved in ~150 mL of deonized water. Ifthe solid salt mixture contained 0.375 g ofCaCl2.2H2O, what is the % mass ofK2C2O4.H2Oin the salt mixture?andfor CaCl2.2H2O? 2.- 7.50 mL of peppermint oil is pippeted into abeaker which has a mass of 3.55 g. If the density of peppermint oilis 0.914 g/cm3, what is the combined mass of the beakerand the sample of peppermint oil? 1.-A 0.972-g sample of aCaCl2.2H2O/K2C2O4.H2Osolid salt mixture is dissolved in ~150 mL of deonized water. Ifthe solid salt mixture contained 0.375 g ofCaCl2.2H2O, what is the % mass ofK2C2O4.H2Oin the salt mixture?andfor CaCl2.2H2O? 2.- 7.50 mL of peppermint oil is pippeted into abeaker which has a mass of 3.55 g. If the density of peppermint oilis 0.914 g/cm3, what is the combined mass of the beakerand the sample of peppermint oil? 2.- 7.50 mL of peppermint oil is pippeted into abeaker which has a mass of 3.55 g. If the density of peppermint oilis 0.914 g/cm3, what is the combined mass of the beakerand the sample of peppermint oil?Explanation / Answer
part1) % mass of CaCl2.2H2O=0.375/0.972*100=38.58% and that of K2C2O4.H2O=100-38.58=61.42
part2) total mass=7.50*0.914+3.55=10.405g
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