Question

Do sample problem 13.10 in the 8th ed of Silberberg. A 0.892 g sample of magnesium chloride dissolves in 96 g of water in a flask. =CH- . = Mg2+ How many moles of Cl-? Enter to 4 decimal places. Question 10 1p Do sample problem 13.10 in the 8th ed of Silberberg. A 0.946 g sample of magnesium chloride dissolves in 83.5 g of water in a flask. = CH = Mg2+ Assuming the solution is ideal, what is the freezing point (at 1 atm)? Enter to 3 decimal places. AT, or AT, - kan (13.12)

Answer 1

Hi my sincere apologies, question 10 requires important K_f (molal freezing point constant) values, which was not provided by you, hence I'm gonna answer 1^st question only to save your Attempts.

moles = mass of substance / molar mass of substance

moles present in 0.892 g of MgCl₂ = 0.892 g / 95.2110 g/mol = 0.00936866538 moles

but 1 mole MgCl2 gives 2 moles Cl-, hence doubles the Cl- ions

2 x 0.00936866538 moles = 0.01873733076 moles

Answer: 0.0187

Do sample problem 13.10 in the 8th ed of Silberberg. A0.892 g sample of magnesium chloride dissolves in 96 g of water in a flask. C Mg2+ A C How many moles of CI ? Enter to 4 decimal places. 0.0187

Hope this helped you!

Thank You So Much! Please Rate this answer as you wish.("Thumbs Up")