In an acidic solution, how does the concentration of H3O+ compare to the concentration of OH- ?

In an acidic solution i.e pH is lower than 7 has higher concentration of hydronium ions compare to the hydroxide ions.

Explanation:

Acidic solutions are those solutions which have pH value less than 7.

Alkaline solutions are those solution which has pH more than 7.

Neutral solutions are those solution which has pH value equal to 7.

The pH of the solution is defined as negative logarithm of hydronium ion concentration present in an aqueous solution .

So, in an acidic solution i.e pH is lower than 7 has higher concentration of hydronium ions compare to the hydroxide ions.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-