# chemistry

posted by .

50 mL of 1.50* 10^-2 M HI(aq) is mixed with 75.00 mL of 1.10* 10^-2 M KOH(aq).

What is the pH of the Final solution

• chemistry -

First you must recognize that HI and KOH are strong acid + strong base respectively. The product is KI (a neutral salt) + H2O; therefore, the pH will depend entirely upon the reagent (HI or KOH) that is in excess. How do you determine the one in excess?

Calculate moles HI initially. That is M x L = ?
Calculate moles KOH initially. That is M x L = ?

Now subtract one from the other to see which one is in excess (obviously, the other one goes to zero since all of it will be used). Then moles/volume = M. Finally, if KOH is in excess, the pOH is the -log(OH^-) remaining or if HI is in excess, pH = -log(H^+) remaining.
Post your work if you get stuck.

## Similar Questions

1. ### chemistry 1st year, for midterm help

Hi, Can any1 help with theses questions. I need to solve these because there will be similar questions on the midterm for me, coming week. Btw I have tried few. 1. How many milliliters of a 15.0%, by mass solution of KOH (Aq) ( d= …
2. ### chemistry

A solution of 0.178 M KOH(28.3 ml) is mixed with 28.9ml of 0.133 M HCl. Assuming that the final solution is the sum of the initial volumes, caculate: a)the molarity of the K+ cation b)the molatiry of the Cl- anion c)the pH of the final …
3. ### Chemistry

The neutralization of H3PO4 with KOH is exothermic. H3PO4(aq) + 3KOH(aq) -> 3H2O(l) +K3PO4(aq) +173.2KJ 70.0 mL of 0.207 M H3PO4 is mixed with 70.0 mL of 0.620 M KOH initially at 21.87 °C. Predict the final temperature of the solution …
4. ### Chemistry

what is the final volume of 1% KOH soltion prepared from a 10ml of a 20% KOH solution?
5. ### Chemistry

Complete this table of initial and final concentrations HF(aq) + KOH(aq) <-> KF(aq) + H20(l) Initial concentrations: HF-2.0M KOH-1.0M KF-0M Final Concentrations?
6. ### Chemistry Urgent

1) 30cm3 of methane and ethane mixed with 100cm3 of O2 at RTP. Explosion occurs, on cooling 61.5cm3 remained. Find the percentage by volume of each gas in the mixture 2)32cm3 of a mix of CO2, CH4 and H2 mix with 50cm3 of O2 and exploded …
7. ### chemistry

A solution of KOH is prepared by dissolving 2.00 g of KOH in water to a final volume of 250 ml of solution what volume of this solution will neutralize 20.0 ml of 0.115 mol/L sulfuric acid?
8. ### Chemistry

Question : ka1 and ka2 values of H2X is given 1*(10)^-5 M and 1*(10)^-9 M.50cm^3 of 0.2 M KOH and 50 cm^3 of H2X of unknown concentration is mixed together and the pH of the final solution is given as 7. 1)Find the concentration of …
9. ### chemistry

Question : ka1 and ka2 values of H2X is given 1*(10)^-5 M and 1*(10)^-9 M.50cm^3 of 0.2 M KOH and 50 cm^3 of H2X of unknown concentration is mixed together and the pH of the final solution is given as 7. 1)Find the concentration of …
10. ### chemistry

A quantity of 85.0 mL of 0.900 M HCl is mixed with 85.0 mL of 0.900 M KOH in a constant-pressure calorimeter that has a heat capacity of 325 J/C. If the initial temperatures of both solutions are the same at 18.24C, what is the …

More Similar Questions