Question

1. В якій і ззазначених групп йонів знаходяться лише катіони: а)NO, ,ОНТ,Cu**, Fe**;0) Al*, Na",Mg**,Zn**; в) ОН ,SO, , s* PO, 3. Серед запропонованих речовин виберіть формулу електроліту: а) Сао; б) N.; в) НСІ.

Answer 1

Відповідь:

1. В якій і ззазначених групп йонів знаходяться лише катіони:

0) Al*, Na",Mg**,Zn**;  

3. Серед запропонованих речовин виберіть формулу електроліту:

в) НСІ.

Пояснення:

Answer 2

Cations in the Given Groups of Ions:

In the given groups of ions, only cations are present. Let's analyze each group:

a) NO, OH-, Cu2+, Fe2+: In this group, only Cu2+ and Fe2+ are cations. The other ions, NO and OH-, are not cations. [[1]]

b) Al3+, Na+, Mg2+, Zn2+: In this group, all the ions are cations. Al3+, Na+, Mg2+, and Zn2+ are all positively charged ions. [[2]]

c) OH-, SO4^2-, S2-, PO4^3-: In this group, none of the ions are cations. OH-, SO4^2-, S2-, and PO4^3- are all negatively charged ions. [[3]]

Therefore, the only group that contains only cations is b) Al3+, Na+, Mg2+, Zn2+.

Choosing the Formula of an Electrolyte:

Among the given substances, we need to choose the formula of an electrolyte. An electrolyte is a substance that conducts electricity when dissolved in water or melted.

a) CaO: Calcium oxide (CaO) is an ionic compound, but it is not an electrolyte because it does not dissociate into ions when dissolved in water.

b) N2: Nitrogen gas (N2) is a covalent compound and does not dissociate into ions when dissolved in water. Therefore, it is not an electrolyte.

c) HCl: Hydrochloric acid (HCl) is a strong acid that dissociates completely into ions when dissolved in water. Therefore, it is an electrolyte.

Therefore, the formula of an electrolyte among the given substances is c) HCl.

I hope this helps! Let me know if you have any further questions.