posted by ami .
What is the pH of the solution obtained by mixing 30.00mL OF 0.250M HCL AND 30.00mL OF 0.125M NaOH?
Write the equation and balance it.
NaOH + HCl ==> NaCl + H2O
Calculate moles NaOH.
Calculate moles HCl.
Set up an ICE chart to see what you finish with.
If the moles base and moles acid are the same, they exactly neutralize each other and the pH will be exactly neutral for you will have table salt in water. If the base is in excess, calculate OH from that. If the acid is in excess, calculate H^+ from that.