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Pre-lab 4 - burgin(lcb626 Pre-lab 4 anderson(53245 This...

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burgin (lcb626) – Pre-lab 4 – anderson – (53245) 1 This print-out should have 5 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 2.0 points Calculate the molecular weight of KHP. The molecular formula of KHP is C 8 H 5 O 4 K. What does the abbreviation KHP stand for? 1. MW = 204.223 grams/mole. KHP stands for potassium hydrogen phosphorus. 2. MW = 71.080. KHP stands for potassium hydrogen phosphate. 3. MW = 204.223 grams/mole. KHP stands for potassium hydrogen phthalate. 4. MW = 71.080 grams/mole. KHP stands for potassium, hydrogen, and phosphorus. 5. MW = 180.1572. KHP stands for potas- sium hydroxy phosphate. 6. MW = 71.080 grams/mole. KHP stands for potassium hydrogen phthalate. 002 2.0 points What is the main objective of Part 1 of the experimental procedure? What is the purpose of using KHP in this part of the experiment? 1. The main objective Part 1 is to determine the purity of the NaOH solution. We can determine the percent purity of the NaOH solution by taking a mole ratio of NaOH to KHP. 2. The main objective of Part 1 is to deter- mine the concentration of the NaOH solution as accurately and precisely as possible. KHP is used as a titration standard because it is very pure, and can therefore yield highly ac- curate results for the NaOH concentration.
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