Chemistry
Explain the following :
A solution of cane sugar does not conduct electricity, but a solution of sodium chloride is a good conductor.
Electrolysis
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Answer
A solution of cane sugar does not conduct electricity because it is composed of molecules that do not dissociate into ions when dissolved in water. In contrast, a solution of sodium chloride does conduct electricity because sodium chloride is an ionic compound consisting of sodium (Na+) and chloride ions (Cl-). When dissolved in water, the sodium ions (Na+) and chloride ions (Cl-) become free to move independently and can carry an electric current.
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Related Questions
To carry out the so-called 'electrolysis of water', sulphuric acid is added to water. How does the addition of sulphuric acid produce a conducting solution?
(a) Choosing only words from the following list, write down the appropriate words to fill in the blanks (i) to (v) below:
anions , anode, cathode, cations , electrode, electrolyte, nickel , voltameter.
The electroplating of an article with nickel requires an (i) …………… which must be a solution containing (ii) …………… ions. The article to be plated is placed as the (iii) …………… of the cell in which the plating is carried out. The (iv) …………… of the cell is made from pure nickel. The ions that are attracted to the negative electrode and discharged are called (v) ……………
(b) When a molten ionic compound is electrolysed, the metal is always formed at …………… and the non-metal is formed at ……………
(c) Electrolysis of acidulated water is an example of …………… (Reduction/ oxidation/ redox reaction/synthesis).
Explain the following :
Hydrochloric acid is a good conductor of electricity.
Explain the following :
During the electrolysis of an aqueous solution of NaCl, hydrogen ion is reduced at the cathode and not the sodium ion though both Na+ and H+ ions are present in the solution.