Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 18.This is the weight of the substance chemically equivalent to 1 mL of the standard solution: a. End point C. Titrand b. Titer d. Equivalence point 19. The apparatus used to wash down drops of standard solution clinging to the tip of the buret is: a. Cassia flask C. Bobcock bottle b. Wash bottle d. Plastic bottle 20. The following characteristics of product with quality, except G

Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 18.This is the weight of the substance chemically equivalent to 1 mL of the standard solution: a. End point C. Titrand b. Titer d. Equivalence point 19. The apparatus used to wash down drops of standard solution clinging to the tip of the buret is: a. Cassia flask C. Bobcock bottle b. Wash bottle d. Plastic bottle 20. The following characteristics of product with quality, except G

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Justify your answer
What is the difference between the endpoint and the equivalence point of a titration? A. The endpoint cannot be seen, the equivalence point requires an indicator B. The equivalence point is the halfway point of the titration, the endpoint is the end of the titration. C. The endpoint is halfway through the titration and the equivalence point is the end of the titration. D. The endpoint is when a color change occurs due to the addition of an indicator that indicates the equivalence point has been reached.
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Can you confidently determine if the molarities are accurate? Explain why or why not.
nal General 2020-2021 / 19 of So Iit one were to add 2.0 mol of sodium chloride to enough water in order to make 1.0 L of solution, what would be the molanty A. 2.0M B. 1.OM C. 0.50M D. 0.10M
8. When determining the content of free alkali in sodium salts of barbiturates, an indicator is used? A. Methyl orange B. Methyl red C. Timolphthalein D. Phenolphthalein.
What is the pH of a buffer made by combining 45 ml of 0.15M nitrous acid and 20 ml of 0.175 M sodium nitrite a. 3.43 b. 3.64 c. 3.28 d. 3.06
Which of the following would be most effective as a buffer? A. pure water B. a mixture of molecules that are bonded to each other with hydrogen bonds C. a mixture of unbonded atoms D. a mixture of molecules with ionic bonds that will break apart into ions E. a mixture of nonpolar molecules
9. Which of the following elements would have the greatest electron affinity? а. carbon b. охygen c. sulfur d. fluorine е. neon 10. A balloon that's inflated indoors and then taken outside on a cold day will: a. increase in volume b. increase in pressure c. decrease in volume d. maintain a constant volume, but have a decrease in pressure 11. In order for a titration to be accurate and precise, which of these things are required? a. have an indicator with an end point pH that will match the equivalence point pH b. it needs to be done very quickly, before competing reactions can occur ensure that no extra distilled water enters the flask during the titration d. the analyte needs to be in the buret, while the titrant needs to be in the flask с.
At which point of the titration curve is there maximum buffering capacity for a weak acid?A. at the start of the titration B. at 25 % neutralization C. at 50 % neutralization D. at 100 % neutralization