Question

I need help please please

Answer 1

The list of strong acids is: HCl, HBr, HI, HClO4, HClO3, HNO3, and H2SO4. Therefore, phosphoric acid H3PO4 is a weak acid. Since the salt of weak acids becomes a strong electrolyte, then K3PO4 is a strong electrolyte.

The first equation just shows dissolution of methanol. the third is for carbonic acid (a weak electrolyte), and the fourth is the dissolution of acetic acid (also a weak electrolyte).

Answer 2

Answer:
K₃PO₄......> 3K⁺ + PO₄³⁻

Explanation:
A strong electrolyte if formed from the salt of a weak acids.

From the list of weak acids attached, we can note that H₃PO₄ is a weak acid. 
This means that its salt (K₃PO₄) would be a strong electrolyte and would ionize completely in water.

Based on the above, we would choose the second option.

Considering the other options:
Options C and D are weak electrolytes
Option A is only dissolution of methanol.

Hope this helps :)