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1. Label the acid and the base, and the conjugate pairs for this reaction. HCO2H+H2O-----> CO2H+H3O 2. Calculate the pH of a 0.25 mol/L solution of magnesium hydroxide. 3. A titration was done to determine the concentration of a sample of HCI. The volume of the acid sample used in each titration trial was 10.00 mL. The following data also was collected: Trial Burette Reading Burette Reading Volume Of Standard @ Start (mL) @ End (mL) Used (mL) 1 0.00 11.30 ? 2 11.30 22.60 ? 3 22.60 33.80 ? Standard Used: 0.25M Ca(OH)2 a. Write the balanced neutralization reaction equation for this titration. b. Write a brief procedure that would have been used to carry out the titration. Just include the key steps (terms and measurements). c. What was the average volume of Ca(OH)2 used? d. Calculate the concentration of the HCI sample.

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