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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Why is it not necessary to know the exact volume of deionized water added when preparing the samples for titration?
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- Why is it normal to add a slight excess of silver nitrate solution when precipitating chloride ion?arrow_forwardThis is 1 question.arrow_forward8. A student conducts an acid-base titration to investigate the change in pH during a reaction between hydrochloric acid and ammonia solution. a. Name a piece of equipment that could be used to provide an accurate measurement of pH during the titration and explain how it would be calibrated. The student transfers 50cm3 of 1.0moldm3 ammonia solution acid into a beaker. During the titration the student adds 50cm3 1.00moldm³ hydrochloric acid from a burette into the beaker and records the pH throughout. b. Sketch the pH curve produced during this titration.arrow_forward
- 2. Using the procedure described in this module, a student determined the percent KHP in an impure sample of KHP. A 3.150-g sample of impure KHP required 41.50 mL of 0.1352M NaOH solution for titration. (a) Calculate the number of moles of NaOH required for the titration. (b) Calculate the number of moles of KHP present in the impure sample of KHP. (c) Calculate the number of grams of KHP present in the impure sample. (d) Calculate the percent of KHP in the impure sample, using Equation 8. Equation 8: percent KHP in the impure sample, % = ( mass of KHP in the sample,g/ mass of sample analyzed, g) (100%)arrow_forwardCalculate the pH for each case in the titration of 50.0 mL of 0.230 M HClO(aq) with 0.230 M KOH(aq). Use the ionization constant for HCIO. What is the pH before addition of any KOH? pH What is the pH after addition of 25.0 mL KOH? pH = What is the pH after addition of 30.0 mL KOH? = pH = pH = What is the pH after addition of 50.0 mL KOH? pH What is the pH after addition of 60.0 mL KOH?arrow_forwardQ/ Mohr's method uses the potassium chromate indicator and this indicator makes the equivalent point not identical to the end point. A sample weighing 5.592 g of BaCl2 is dissolved in 500 mL of water. Calculate the percentage of chloride in the sample when 25 mL of the sample is titrated and requires 33.47 mL of 0.1098 N AGNO. SOLUTION:arrow_forward
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