Chemistry · The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions
An aqueous solution is 1 molal in Which change will cause the vapour pressure of
An aqueous solution is 1 molal in \( K I \) Which change will cause the vapour pressure of the solution to increase?
- A. Addition of \( N a C l \)
- B. Addition of \( N a_{2} S O_{4} \)
- C. Addition of 1 molal \( K I \)
- D. Addition of water
Step-by-step solution
Adding water increases the mole fraction of solvent (water), which raises the vapor pressure according to Raoult's law. Adding solutes (NaCl, Na2SO4, or additional KI) would further lower the vapor pressure.
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