Homework Answers
1)
moles of NaOH = 27.6 x 0.107 / 1000
moles of NaOH = 2.95 x 10^-3 mol
2)
moles of KHP = 2.95 x 10^-3 mol
3)
moles of KHP = moles of NaOH
3 x 10^-3 x M = 2.95 x 10^-3
M = 0.984
Molarity of KHP = 0.984 M
4)
Ksp of = 0.0965 x 0.0965
Ksp of the solution = 9.31 x 10^-3
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A student gets a 3 mL sample of saturated KHP at 28.0°C. It takes 27.6 mL...
A 1.413-g sample of KHP takes 19.43 mL of a NaOH solution to titrate it to...
A 1.413-g sample of KHP takes 19.43 mL of a NaOH solution to titrate it to a phenolphthalein end point. What is the molarity of the NaOH solution? The molar mass of KHP is 204.2g/mol.
Sample 1 .674a Sample 3 0.00 -63619_573989 Sample 2 Mass of KHP taken Initial NaOH buret...
Sample 1 .674a Sample 3 0.00 -63619_573989 Sample 2 Mass of KHP taken Initial NaOH buret reading c om m e Final NaOH buret reading 33. ML 32.30ml Volume of NaOH used 33 mL 32.3mL Moles of KHP present 003_ moles_003 mole s kup Molarity of NaOH solution 10 M Mean molarity of NaOH solution and average deviation 0 04 M اور * 5% vinesar Sample 2 WHO Analysis of Vinegar Solution (Part 4a) Identification number (or brand) of vinegar...
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A student weighs 0.683 g of potassium acid phthalate, HKC_8H_4O_4, abbreviated KHP (MM = 204.2 g/mol) and titrates it with NaoH. The initial buret reading is 0.12 mL and the final buret reading at the end-point is 33.86 mL. a. How many moles of KHP were used? _________ b. How many moles of NaoH were used? ___________ c. What is the molarity of the base? The student then titrates 5.00 mL of vinegar with the same base. The initial buret...
Objective 1: Standardization with KHP Trial 1 Mass of KHP Trial 2 Trial 3 ,5825 9...
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please type answer or fill in the blanks PLEASE UU ANITOUESTIONS EXPERIMENT 10 PRE-LABORATORY STANDARDIZATION OF...
please type answer or fill in the blanks PLEASE
UU ANITOUESTIONS EXPERIMENT 10 PRE-LABORATORY STANDARDIZATION OF A SODIUM HYDROXIDE SOLUTION NAME DATE 1. What is the purpose of this experiment? 2. A sample of KHP has a mass of 2.345 g is used for a titration, how many moles of KHP is this sample? 3. How many moles of NaOH would be needed to reach the endpoint of this titration with sample of KHP from the previous question? 4. If...
A student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for...
A student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for a titration. She later discovers that the KHP was contaminated with sugar. To determine the amount of KHP in the mixture, she takes 5.942 g of the mixture and make a 100.0 mL solution. The student then titrates 10.00 mL of this solution with a 0.1491 M sodium hydroxide solution. She finds that 13.12 mL of the NaOH solution is needed to reach the...
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Mass of empty flask (9) Mass of flask + KHP (9) Mass of KHP (g) TRIAL 1 L TRIAL 2 TRIAL 3 94.560g 89.0050 89 7357 94.9109 89.353 : 90.0949 0.250 0.3489 0.3499 0.00171 mol 0.00170.10 0.00171 wol 10.60 mL 0.83 L 60.50mL 10.83 mL 60.50 ML 124-80 with Moles of KHP Initial buret reading (mL) Final buret reading (mL) Volume NaOH solution used (ml) Moles of NaOH used Molarity NaOH Average Molarity of NaOH 0.00171md 0.00170 ud 0.0017 md
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Stimulus 2 A student sets up a titration for the standardization of NaOH using KHP (KHC3H404). The reaction proceeds as follows: NaOH(aq) + KHC9H404 (aq) --> KNaC9H404 (aq) + H20 (0 The student collects the following data: Initial Buret Reading NaOH 2.15 ml Final Buret Reading NaOH 20.83 mL What is the total volume of NaOH needed to neutralize the KHP? Answer in ml (don't type the unit) and with the correct number of significant figures Type your answer... 12...
Sample 1 .674a Sample 3 0.00 -63619_573989 Sample 2 Mass of KHP taken Initial NaOH buret reading c om m e Final NaOH buret reading 33. ML 32.30ml Volume of NaOH used 33 mL 32.3mL Moles of KHP present 003_ moles_003 mole s kup Molarity of NaOH solution 10 M Mean molarity of NaOH solution and average deviation 0 04 M اور * 5% vinesar Sample 2 WHO Analysis of Vinegar Solution (Part 4a) Identification number (or brand) of vinegar...
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Objective 1: Standardization with KHP Trial 1 Mass of KHP Trial 2 Trial 3 ,5825 9 53539 1.53169 *Moles of KHP: Initial buret reading: 0.00 mL 10.00 Final buret reading: 0.00ML 8 mb 16.5 mL I 10.9 mL *Volume of NaOH solution used: 16.5 mL 8 mL 10.9mL *Molarity of NaOH solution: Show your calculations here: *Average Molarity of NaOH: Percent Range:
please type answer or fill in the blanks PLEASE
UU ANITOUESTIONS EXPERIMENT 10 PRE-LABORATORY STANDARDIZATION OF A SODIUM HYDROXIDE SOLUTION NAME DATE 1. What is the purpose of this experiment? 2. A sample of KHP has a mass of 2.345 g is used for a titration, how many moles of KHP is this sample? 3. How many moles of NaOH would be needed to reach the endpoint of this titration with sample of KHP from the previous question? 4. If...
A student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for a titration. She later discovers that the KHP was contaminated with sugar. To determine the amount of KHP in the mixture, she takes 5.942 g of the mixture and make a 100.0 mL solution. The student then titrates 10.00 mL of this solution with a 0.1491 M sodium hydroxide solution. She finds that 13.12 mL of the NaOH solution is needed to reach the...
Mass of empty flask (9) Mass of flask + KHP (9) Mass of KHP (g) TRIAL 1 L TRIAL 2 TRIAL 3 94.560g 89.0050 89 7357 94.9109 89.353 : 90.0949 0.250 0.3489 0.3499 0.00171 mol 0.00170.10 0.00171 wol 10.60 mL 0.83 L 60.50mL 10.83 mL 60.50 ML 124-80 with Moles of KHP Initial buret reading (mL) Final buret reading (mL) Volume NaOH solution used (ml) Moles of NaOH used Molarity NaOH Average Molarity of NaOH 0.00171md 0.00170 ud 0.0017 md
Questions: 1. 495 mg of dried KHP is dissolved in 35 mL of distilled water and titrated with potassium hydroxide (KOH). If it took 22.02 mL of KOH to reach the endpoint, determine the concentration of KOH. Show calculations. If you forgot to dry the above KHP sample and it was later determined to contain 5.00 % water by weight, what would be the actual concentration of the KOH, taking into account the water content? Show calculations. 2. If you...
Materials: NaOH MW = 40 g/mL, KHP - potassium hydrogen phthalate, KHC8H404, MW = 204.23 g/mol. Acetic acid, HC2H302, MW = 60.05 g/mol Part 1: Standardization of NaOH Assume 0.951 g of KHP is weighed and transferred to a 250 mL Erlenmeyer flask. Approximately 50 ml water is added to dissolve the KHP. Note that the exact volume of water is not important because you only need to know the exact number of moles of KHP that will react with...
Stimulus 2 A student sets up a titration for the standardization of NaOH using KHP (KHC3H404). The reaction proceeds as follows: NaOH(aq) + KHC9H404 (aq) --> KNaC9H404 (aq) + H20 (0 The student collects the following data: Initial Buret Reading NaOH 2.15 ml Final Buret Reading NaOH 20.83 mL What is the total volume of NaOH needed to neutralize the KHP? Answer in ml (don't type the unit) and with the correct number of significant figures Type your answer... 12...
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