Answered: I need 250 mL of a 1.5 M solution of…

I need 250 mL of a 1.5 M solution of KOH for a particular reaction. I will make it by diluting a stock solution of 9.0 M KOH. How many mL of stock solution do I need to measure out?

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 121AP: Calcium carbonate, CaCO3, can be obtained in a very pure state. Standard solutions of calcium ion...

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I need 250 mL of a 1.5 M solution of KOH for a particular reaction. I will make it by diluting a stock
solution of 9.0 M KOH. How many mL of stock solution do I need to measure out?
Note: must give answer in mL. if you answer in L the computer will mark it wrong.

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Will the calculated Molarity of NaOH be too high or too low or unaffected if the following happen: When you answer the question, consider how the situation affects the calculation of molarity of NaOH and moles NaOH, which is calculated from the mass of KHP. For each answer, you must supply a clear explanation for your answer. Often times, students will restate the facts rather than explaining why they chose the answer they chose. a) You add the weighed KHP to a flask containing a 60mL of water rather than 50 mL of water. Explain. Your answer must contain a well-thought-out and clearly written explanation. b) The buret is still wet with water on the inside when you add your NaOH solution. Explain c) The KHP is wet when you weigh it. Explain. d) You titrate past the equivalence point by 0.50mL Answer a-d
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Name Chem Section Data Sheet determination 23°C 23°C 25°C temperature of filtered KHT solution, °C 0.04m concentration of NaOH solution, mol L- 0.04 m 0.04m KHT solution 14.9 49-5 final buret reading, mL initial buret reading, mL 49.9 volume of KHT used, mL NaOH solution 28 final buret reading, mL 10 49.8 १.१ 49.7 initial buret reading, mL 50 40mL volume of NaOH used, mL number of moles of NaOH used 0014 0014 number of moles of HT titrated .04 [HT] in KHT solution, mol L- 1.42 1.142 1.142 [K*] in KHT solution, mol L-1 solubility of KHT, mol L-1 average solubility of KHT, mol L- Ksp average Ksp