CHROMATE DICHROMATE

Question 1

“ If a stress is applied to a system at equilibrium, the position of the equilibrium will shift in the direction which reduces the stress”

Answer 1

Le Chatelire’s Principle

Question 2

forward reaction (from left to right)=________ (absorbs heat from the surroundings)

Answer 2

endothermic reaction

Question 3

reverse reaction (from right to left)=________ (releases heat to its surroundings)

Answer 3

exothermic reaction

Question 4

Materials needed for chromate dichromate

Answer 4

• 0.1 M Nitric acid, 10 ml
• Chemical formula: HNO₃
• 0.1 M Sodium hydroxide, 10 ml
• Chemical formula: NaOH
• 0.1 M Potassium chromate, 10 ml
• Chemical formula: K2CrO4
• 0.1 M Potassium dichromate, 10 ml
• Chemical formula: K2Cr2O7
• Barium chloride, 20 ml
• Chemical formula: BaCl2

Question 5

Apparatus needed for chromate dichromate

Answer 5

• 7 Test tubes
• Test tube rack
• Stirring rod
• Dropper