Question

Please SHOW WORK

1)

what is the concentraton of chloride ions in a solution prepared by mixing 100.0mL of a 0.100M NaCl solution with 100.0mL of a 0.100M MgCl2 solution?

2)

Suppose that 0.1g of H20(g) is placed in a tank with a volume of 10.0L. Calculate the pressure of the water vapor (in Torr) in the tank assuming that the temperature is 25.0C

Answer 1

1. Solution is made by mixing 100ml x 0.1 mol acl lommo Naci Nael - Natti lommal Nace will give lo mmol of Ct Also; 100 ml x 0.1 mol Mga, = 10 mmol of MgCl2 Mga → Mg2+ +26 i Imol. Mgch gives 2mol of at in 10 mmol " " 20 mmola-

total = Tommol +2ommo = 30 mmol [6] = 30mmol (loo tloo), AL (617)= 0.15 malt This concentration of ct was found to be 0.15 molt H₂o mass = 0.19 moles= mass = oilg molar mass 18g mot = 5.55 x103 mol Volume = lol P=? T= 25°C= 298k ". Using Ideal gas equation ; PV=nRT P= ART = 5.55xloxo. 0821 x 298 mol Latamót k k lol -0.01358 atin : 76 atm = 760 torr 0.0135Cath = 760 torr X0.0135 Barm latm 10.3208 torr L Thus, fressure of water vapour inside the tark is 10.3208 torr