Chem test acid base

5.65 mL of 0.23 M Ba(OH)2 is delivered while titrating of 20 mL of 0.39 M HCN. The volumes are additive and the temperature of the solution is 25 C. Ka for HCN is 6.2x10^-10. How many moles of OH- were added

0.0026 mol

15 mL of 0.325 M NaOH is delivered into a 35 mL HO Br solution of unknown concentration. The pH of the final solution is measured to be 7.47. Ka for HOBr is 2.0x10^-9. Find the number of moles of NAOH added during the titration

0.0049 mol

A 25 mL sample of 0.5 M LiOH is mixed with 37 mL of 0.65 M acetic acid at 25 C. Ka for acetic acid is 1.8x10^-5. Find the numbers of moles of acetic acid and acetate ion in the final solution.

0.011 mol acetic acid. 0.013 mol acetate

A 25 mL sample of 0.5 M LiOH is mixed with 37 mL of 0.65 M acetic acid at 25 C. Ka for acetic acid is 1.8x10^-5. How many moles of LiOH were added

0.013

A 25 mL sample of 0.5 M LiOH is mixed with 37 mL of 0.65 M acetic acid at 25 C. Ka for acetic acid is 1.8x10^-5. Find the concentrations of acetic acid and acetate ion in the final solution

0.18 M acetic acid, 0.21 M acetate

A 65 mL sample of 0.35 M NH3 is titrated with 0.25 M HCl. Kb for ammonia is 1.8x10^-5. Find the pH of the solution after 151 mL of 0.25 MHCl have been added.

1.16

A 45 mL sample of 0.175 M KOH is titrated with 0.200 M HI. Find the pH when 63mL of 0.2 M HI have been added.

1.3

15 mL of 0.325 M NaOH is delivered into a 35 mL HO Br solution of unknown concentration. The pH of the final solution is measured to be 7.47. Ka for HOBr is 2.0x10^-9. Find the concentrations of OBr and HOBr in the final solution

1.6 M HOBr and 0.098M OBr

A beaker containing 125 mL of a 0.12 M HOCl is titrated using 0.25M NaOH. Ka for HOCl is 3.5x10^-8. What is the pH at the equivalence point

10.18

A 65 mL sample of 0.35 M NH3 is titrated with 0.25 M HCl. Kb for ammonia is 1.8x10^-5. Find the initial pH of the 0.35M NH3

11.4

A 45 mL sample of 0.175 M KOH is titrated with 0.200 M HI. Find the pH when 18 mL of 0.2 M HI have been added

12.83

A 45 mL sample of 0.175 M KOH is titrated with 0.200 M HI. Find the initial pH of the 0.175 M KOH solution

13.243

5.65 mL of 0.23 M Ba(OH)2 is delivered while titrating of 20 mL of 0.39 M HCN. The volumes are additive and the temperature of the solution is 25 C. Ka for HCN is 6.2x10^-10. Find [H+] in the final solution

2x10^-9

15 mL of 0.325 M NaOH is delivered into a 35 mL HO Br solution of unknown concentration. The pH of the final solution is measured to be 7.47. Ka for HOBr is 2.0x10^-9. Find [OH-] in the final solution

3.0x10^-7

15 mL of 0.325 M NaOH is delivered into a 35 mL HO Br solution of unknown concentration. The pH of the final solution is measured to be 7.47. Ka for HOBr is 2.0x10^-9. Find [H+] in the final solution.

3.3x10^-8 M

A 25 mL sample of 0.5 M LiOH is mixed with 37 mL of 0.65 M acetic acid at 25 C. Ka for acetic acid is 1.8x10^-5. Find the pH of the final solution

4.81

A 45 mL sample of 0.175 M KOH is titrated with 0.200 M HI. How many milliliters of 0.2 M HI must be added to reach the equivalence point.

40 mL

A 65 mL sample of 0.35 M NH3 is titrated with 0.25 M HCl. Kb for ammonia is 1.8x10^-5. Find the pH at the equivalence point

5.04

5.65 mL of 0.23 M Ba(OH)2 is delivered while titrating of 20 mL of 0.39 M HCN. The volumes are additive and the temperature of the solution is 25 C. Ka for HCN is 6.2x10^-10. Find [OH-] in the final solution.

5x10^-6M

A beaker containing 125 mL of a 0.12 M HOCl is titrated using 0.25M NaOH. Ka for HOCl is 3.5x10^-8. What volume of NaOH must be delivering to reach the equivalence point

60 mL

A 45 mL sample of 0.175 M KOH is titrated with 0.200 M HI. What is the pH at the equivalence point

7

A 65 mL sample of 0.35 M NH3 is titrated with 0.25 M HCl. Kb for ammonia is 1.8x10^-5. Find the pH of the solution after 31 mL of 0.25 M HCl have been added

9.55

A beaker containing 125 mL of a 0.12 M HOCl is titrated using 0.25M NaOH. Ka for HOCl is 3.5x10^-8. Why is the solution basic at the equivalence point

HOCL is A weak acid, so it conjugate base, OCl, is relatively strong. At the equivalence point, equal numbers of moles of HOCL & OH have reacted. The only species remaining in solution that can affect the pH is OCL, which is basic.

Which of the following indicators should be used to signal the endpoint of titration of a strong acid strong base reaction: methyl red (pKa 5.5) litmus (pKa 7) or phenolphthalein (pKa 8.7)

Litmus

A 65 mL sample of 0.35 M NH3 is titrated with 0.25 M HCl. Kb for ammonia is 1.8x10^-5. Which of the following indicators should be used to signal the endpoint of titration of this reaction: methyl red (pKa 5.5) litmus (pKa 7) or phenolphthalein (pKa 8.7)

Methyl red