Question

What is the ph and poh of a solution made by adding water to 15 grams of hydrochloric acid until the volume of the solution if 2500 mL

Answer 1

pH= 0.8

pOH= 13.2

Step-by-step explanation:

Number of moles = mass/molar mass

mass= 15 g

molar mass =36.5 g/mol

Number of moles = 15 g/36.5 g/mol = 0.4 moles

From;

n= CV

Where;

C= concentration of solution

V= volume of solution

n= Number of moles

C = n/V

n= 0.4 moles

V= 2500mL or 2.5 L

C= 0.4/2.5

C= 0.16 M

Hence [H^+] = 0.16 M

pH= - log [H^+]

pH= 0.8

pOH= 14 - pH

pOH= 14 - 0.8

pOH= 13.2