What is the pH of 15 mL of .2 M HCl
1 answer:
You might be interested in
Solution :
Given :
Amount of anserine solution = 0.200 M
pH value is = 7.20
Preparation of 0.04 M solution of anserine from the 0.2 M solution.
0.2 M x = 0.04 M x 1000 ml
= 200 ml
So the 200 ml of 0.2 M anserine solution is required to prepare0.04 M of anserine.
0.1 M x = 0.04 x 1000 ml
= 400 ml
Therefore, 400 ml of HCl is needed.
<u>Answer:</u> The atoms of every element on both the sides of the reaction must be same.
<u>Explanation:</u>
We are given a chemical equation and we need to balance it. Every equation follows Law of Conservation of mass.
This law states that in a chemical reaction, the number of atoms of each element must be same on both the sides of the equation.
For the given chemical equation:
On reactant side:
Number of zinc atoms = 1
Number of hydrogen atoms = 1
Number of chlorine atoms = 1
On product side:
Number of zinc atoms = 1
Number of hydrogen atoms = 2
Number of chlorine atoms = 2
As, the number of hydrogen and chlorine atoms on reactant and product side is not same, so we need to add a stoichiometric coefficient in-front of HCl on the reactant side. The balanced chemical equation becomes: