Activity 1H:
Compounds can be classified into electrolytes and non-electrolytes.
How do you prove a substance is an electrolyte or non-electrolyte?
1. Carry out this activity in pairs.
2. Each group will choose one substance X to be investigated. Substance X provided are as follows:
(a) Solid copper(II) chloride, CuCl2
(b) Solid glucose, C6H12O6
(c) Solid oxalic acid, C2H2O4
(d) Aqueous ammonia, NH3
(e) Liquid hexane, C6H14
(f) Liquid ethanol, C2H5OH
3. By taking into consideration the safety factors and properties of substance X, you can use the set-up of apparatus in Figure 1.22 or Figure 1.23 to determine the electrical conductivity of substance X.
4. Get your teacher’s consent to carry out the activity. The chosen set-up of apparatus must be suitable for substance X to be investigated.
5. Prepare a brief presentation on the activity that you have carried out by including the following information:
(a) Observations on whether the bulb lights up or not.
(b) Inference from your observation.
(c) Conclusion on the chosen substance whether it is an electrolyte or non-electrolyte.
6. Present your findings to your classmates.
Answer:
Compounds can be classified into electrolytes and non-electrolytes.
How do you prove a substance is an electrolyte or non-electrolyte?
1. Carry out this activity in pairs.
2. Each group will choose one substance X to be investigated. Substance X provided are as follows:
(a) Solid copper(II) chloride, CuCl2
(b) Solid glucose, C6H12O6
(c) Solid oxalic acid, C2H2O4
(d) Aqueous ammonia, NH3
(e) Liquid hexane, C6H14
(f) Liquid ethanol, C2H5OH
3. By taking into consideration the safety factors and properties of substance X, you can use the set-up of apparatus in Figure 1.22 or Figure 1.23 to determine the electrical conductivity of substance X.
4. Get your teacher’s consent to carry out the activity. The chosen set-up of apparatus must be suitable for substance X to be investigated.
5. Prepare a brief presentation on the activity that you have carried out by including the following information:
(a) Observations on whether the bulb lights up or not.
(b) Inference from your observation.
(c) Conclusion on the chosen substance whether it is an electrolyte or non-electrolyte.
6. Present your findings to your classmates.
Answer: