The diagram shows the enthalpy changes when sodium chloride is dissolved in water. Name the enthalpy changes labelled A, B and C.

In step A, gaseous ions are combining to form an ionic solid crystal. Therefore, the equation represents the lattice enthalpy, ∆ H latt for NaCl . Na + ( g ) + Cl - ( g ) → NaCl ( s ) In step B, gaseous ions Na + and Cl - dissolves in sufficient water to form a very dilute solution. Therefore, the equation represents the enthalpy change of hydration, ∆ H hyd . Na + ( g ) + Cl - ( g ) + aq → Na + ( aq ) + Cl - ( aq ) In step C, 1 mole of ionic solid, NaCl dissolves in sufficient water to form a very dilute solution. Therefore, the equation represents the standard enthalpy change of solution, ∆ H sol for NaCl . NaCl ( s ) → Na + ( aq ) + Cl - ( aq )

E M B I B E

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 19 - Lattice Energy>EXAM-STYLE QUESTIONS>Q 6

EASY

AS and A Level

IMPORTANT

Earn 100

The diagram shows the enthalpy changes when sodium chloride is dissolved in water.

Write symbol equation that describe the enthalpy change of solution of sodium chloride.

Important Questions on Lattice Energy

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 19 - Lattice Energy>EXAM-STYLE QUESTIONS>Q 6

The diagram shows the enthalpy changes when sodium chloride is dissolved in water.

Question Image

Write symbol equation that describe the enthalpy change of hydration of the chloride ion.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 19 - Lattice Energy>EXAM-STYLE QUESTIONS>Q 6

The diagram shows the enthalpy changes when sodium chloride is dissolved in water.

Question Image

Name the enthalpy changes labelled A, B and C.

MEDIUM

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 19 - Lattice Energy>EXAM-STYLE QUESTIONS>Q 6

Draw the water molecules around magnesium ions and sulfate ions in a solution of magnesium sulfate.

MEDIUM

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 19 - Lattice Energy>EXAM-STYLE QUESTIONS>Q 6

Explain, in terms of differences of lattice energies and enthalpy changes of hydration, why magnesium sulfate is more soluble in water than calcium sulfate.