oooO T-Mobile 89%) 10:38 PM ì¬ organic.cc.stonybrook.edu Question i In your first titration, using phenolthalein as the indicator, you weigh out 967.9 mg of your unknown acid sample. Dissolving this in water and titrating with NaOH you find that 28.62 mL is required to reach the equivalence point. What mass (mg) of your sample should you weigh out in order to consume 25 mL of the titrant ? Enter a numeric answer only, do not include units. Enter Your Answer: For your next titration you weigh out an actual amount of 910.6 mg of your sample. Dissolving in water and then titrating with 0.191 M NaOH produces the pH titration curve shown below. Volume of NaCH Added t Based on the above curve, what volume of NaOH (mL) was used to reach the equivalence point? Enter a numeric answer only, to three significant figures. Do not include units. Enter Your Answer: How many mmol of NaOH were added to the 910.6 mg of weak acid sample in order to reach the equivalence point? Enter a numeric answer to three significant figures. Questien 3 Enter Your Answer: How many mmol of weak acid are in the titrated sample ? Enter a numeric answer to three significant figures. Questien 4 Enter Your Answer: