The correct answers are:
17. All of the above
18. hydrogen gas and oxygen gas
19. <span>deposition of a metal layer on a material</span>
Electrolytic cells use electric currents to drive a non-spontaneous reaction forward. This is also used in electroplating which involves the movement of metal cations to the surface of another metal. Water can also undergo electrochemical reactions by splitting it into its gaseous components, hydrogen and oxygen.
c. table salt is a metalloid with properties of both reactants
Answer:
Explanation:
Mixtures are impure substances with the following properties:
- Their composition is indefinite i.e they consisit of two or more elements or compounds in any proportion by mass.
- Their constituents retains their identity i.e physical properties are retained.
- They can easily be seperated by physical methods into their constituents.
It is important to seperate materials from mixtures because mixtures do not undergo chemical changes when they combine. This implies that they can easily be seperated using simple seperation techniques with the constituents still retaining their properties.