Answer in General Chemistry for Nolha #152292
March 17th, 2023
We find the moles first
(0.75×0.1)mol NaOH +(0.25×0.3)mol HCl
0.075 mol NaOH +0.075mol HCl
O.075mol/L +NaOH+ 0.075mol/L HCl
0.075mol/L NaCl appears after the mixing
O.075M NaCl———0.075M Na+ +0.075M Cl–
0.075M Na+ +HOH———-no hydrolysis
0.075M Cl– +HOH ————no hydrolysis
Therefore the PH of the solution is determined by the ionisation of H2O=H+ + OH–
At 25°c the molar conc of pure water is
[H+]=[OH–]=1×10-7M
Since the conc of the reaction depends on water then the hydronium-ion concentration of the reaction is;
1×10-7M