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20 solutions

Equivalence Point

Q. Tartaric acid,H2C4H4O6, has two acidic hydrogens. The acid is often present in wines and precipitates from solution as the wine ages. A solution containing an unknown concentration of the acid is titrated with NaOH. It requires 24.65mL of 0.2500M NaOH solution to titrate both acidic protons in 50.00mL of the tartaric acid solution. Write a balanced net ionic equation for the neutralization reaction, and calculate the molarity of the tartaric acid solution.

Solved • Sep 10, 2019

Equivalence Point

Q. By titration, it is found that 96.5 mL of 0.148 M NaOH is needed to neutralize 25.0 mL of HCl. Calculate the concentration of the HCl solution.

Solved • Sep 1, 2019

Equivalence Point

Q. How many mL of 0.050 M NaOH are required to fully react with all of the acidic protons in 10.00 mL of 525 ppm H3PO4?

Solved • Aug 29, 2019

Equivalence Point

Q. At the equivalence point of each of the following titrations, classify each of these solutions as acidic, basic or netural. (a) 20 mL of 0.20 M HNO3 + 20 mL of 0.20 M NH3 (b) 20 mL of 0.20 M HF + 20 mL of 0.20 M KOH (c) 20 mL of 0.20 M HCl + 20 mL of 0.20 M NaOH

Solved • Aug 4, 2019

Equivalence Point

Q. For each of the following titrations, state whether the pH at the equivalence point is lower than 7, equal to 7, or greater than 7: (a) HClO4(aq) titrated with NaOH(aq) (b) HF(aq) titrated with KOH(aq) (c) NH3(aq) titrated with HCl(aq) (d) HNO3(aq) titrated with KOH(aq)

Solved • Aug 4, 2019

Equivalence Point

Q. When titrating a weak monoprotic acid with NaOH at 25°C, the A) pH will be less than 7 at the equivalence point. B) titration will require more moles of base than acid to reach the equivalence point. C) pH will be equal to 7 at the equivalence point. D) titration will require more moles of acid than base to reach the equivalence point. E) pH will be greater than 7 at the equivalence point.

Solved • Jul 15, 2019

Equivalence Point

Q. Examine the titration curve shown. The volume of titrant required to reach the end point of the titration is approximately A) 40 mL. B) 80 mL. C) 90 mL. D) 20 mL. E) 60 mL.

Solved • Jul 15, 2019