- #1

WK95

- 139

- 1

## Homework Statement

An aqueous solution contains 0.84 g/L of an organic detergent. The osmotic pressure of this solution is 54.4 torr, at 25°C. What is the molar mass (in g/mol) of this detergent?

## Homework Equations

##pi=MRT##

##R=0.08206L*atm/(mol*K)##

## The Attempt at a Solution

##pi=MRT##

##M=pi/(RT)##

##M=(54.4 torr * 1 atm/760 torr)/(0.08206L*atm/(mol*K))(298.15 K)##

This is wrong but I;m not sure why and how to get the right asnwer.

## Homework Statement

What is the equilibrium constant expression for the following reaction:

PtCl42−(aq)↔Pt2+(aq) + 4Cl−(aq)

Choose from the list below and enter the letters alphabetical order. (e.g. For an equilibrium constant of [Cl-]4eq[Pt2+]eq enter AH.)

A) [Pt2+]eq E) [Cl-]-1eq I) [PtCl42-]4eq

B) [Cl-]eq F) [PtCl42-]-1eq J) [Pt2+]-4eq

C) [PtCl42-]eq G) [Pt2+]4eq K) [Cl-]-4eq

D) [Pt2+]-1eq H) [Cl-]4eq L) [PtCl42-]-4eq