Methodological recommendations for Summative Assessment on the subject «Chemistry» (social-humanitarian direction)
SUMMATIVE ASSESSMENT FOR THE TERM 2
Summative Assessment for the unit 10.2A “Regularities of chemical reactions”
Learning objectives 10.2.3.2 Be able to compose oxidation and reduction equations
using the electronic balance method
10.2.3.5 Be able to plot diagrams for the electrolysis of melts and
solutions
10.3.4.1 Prove the qualitative composition of solutions of acids,
hydroxides and salts according to the pH of solutions
10.3.1.1 Be able to classify chemical reactions by their thermal
effect
Assessment criteria A learner
Write oxidation and reduction equations using the
electronic balance method
Draw diagrams for the electrolysis of solutions and
molten compounds
Describe the qualitative composition of solutions of acids,
hydroxides and salts according to the ph of solutions
Classify chemical reactions by their thermal effect
Level of thinking skills Knowledge and comprehension
Application
Higher order thinking skills
Duration 20 minutes
Task
1. (a) Use the electronic balance method to complete these equations.
(i) H2SO4 + HI → S + I2 + H2O
(ii) HBr + H2SO4 → Br2 + SO2 + H2O
(iii) V3+ + I2 + H2O → VO2+ + I–
+ H+
2. Identify the anode and cathode products during the electrolysis of aqueous Na2SO4
solution.
3. (a) Describe the acid–base nature of the solutions obtained when the following compounds
are added to water. Use equations to illustrate your answers.
(i) sodium chloride
(ii) sulfur trioxide
(iii) sodium oxide
(b) (i) Write an equation for the reaction of magnesium with cold water.
(ii) Predict and explain the pH of the resulting solution.
Summative Assessment for the unit 10.2A “Regularities of chemical reactions”
Learning objectives 10.2.3.2 Be able to compose oxidation and reduction equations
using the electronic balance method
10.2.3.5 Be able to plot diagrams for the electrolysis of melts and
solutions
10.3.4.1 Prove the qualitative composition of solutions of acids,
hydroxides and salts according to the pH of solutions
10.3.1.1 Be able to classify chemical reactions by their thermal
effect
Assessment criteria A learner
Write oxidation and reduction equations using the
electronic balance method
Draw diagrams for the electrolysis of solutions and
molten compounds
Describe the qualitative composition of solutions of acids,
hydroxides and salts according to the ph of solutions
Classify chemical reactions by their thermal effect
Level of thinking skills Knowledge and comprehension
Application
Higher order thinking skills
Duration 20 minutes
Task
1. (a) Use the electronic balance method to complete these equations.
(i) H2SO4 + HI → S + I2 + H2O
(ii) HBr + H2SO4 → Br2 + SO2 + H2O
(iii) V3+ + I2 + H2O → VO2+ + I–
+ H+
2. Identify the anode and cathode products during the electrolysis of aqueous Na2SO4
solution.
3. (a) Describe the acid–base nature of the solutions obtained when the following compounds
are added to water. Use equations to illustrate your answers.
(i) sodium chloride
(ii) sulfur trioxide
(iii) sodium oxide
(b) (i) Write an equation for the reaction of magnesium with cold water.
(ii) Predict and explain the pH of the resulting solution.