(A) Sample Problem: A 12.1 Moles NaOH solution means there are 12.1 moles of NaOH in liter of solution. Preparation of 12.1 M NaOH: Step 1: Determine the number of grams of NaOH in 12.1 moles of NaOH solution 1 mole of NaOH = ___g of NaOH, in 12.1 moles of NaOH, there are ___g of NaOH. Show the calculation to obtain the number of grams of NaOH Step 2: Now weigh -___of NaOH (resulted mass of NaOH in step 1) using balance. Step 3: Put the ___g of NaOH in a beaker, then add enough water to make it 1 Liter of solution. Stir the solution until NaOH is completely dissolved. (B) Sample Problem: A chemist prepares a solution by dissolving .8 mole of NaOH in water to give a 50 ml solution. What is the molarity of this solution? (C) Sample problem: What is molality of a solution prepared by dissolving 20g MgCl2 in 250 g water? (D) Sample Problem: What is the mole fraction of the particles contained in a 25% sucrose ?
(A) Sample Problem: A 12.1 Moles NaOH solution means there are 12.1 moles of NaOH in liter of solution. Preparation of 12.1 M NaOH: Step 1: Determine the number of grams of NaOH in 12.1 moles of NaOH solution 1 mole of NaOH = ___g of NaOH, in 12.1 moles of NaOH, there are ___g of NaOH. Show the calculation to obtain the number of grams of NaOH Step 2: Now weigh -___of NaOH (resulted mass of NaOH in step 1) using balance. Step 3: Put the ___g of NaOH in a beaker, then add enough water to make it 1 Liter of solution. Stir the solution until NaOH is completely dissolved. (B) Sample Problem: A chemist prepares a solution by dissolving .8 mole of NaOH in water to give a 50 ml solution. What is the molarity of this solution? (C) Sample problem: What is molality of a solution prepared by dissolving 20g MgCl2 in 250 g water? (D) Sample Problem: What is the mole fraction of the particles contained in a 25% sucrose ?
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter11: Solutions
Section: Chapter Questions
Problem 65AP
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(A) Sample Problem: A 12.1 Moles NaOH solution means there are 12.1 moles of NaOH in liter of solution. Preparation of 12.1 M NaOH:
Step 1: Determine the number of grams of NaOH in 12.1 moles of NaOH solution
1 mole of NaOH = ___g of NaOH, in 12.1 moles of NaOH, there are ___g of NaOH.
Show the calculation to obtain the number of grams of NaOH
Step 2: Now weigh -___of NaOH (resulted mass of NaOH in step 1) using balance.
Step 3: Put the ___g of NaOH in a beaker, then add enough water to make it 1 Liter of solution. Stir the solution until NaOH is completely dissolved.
(B) Sample Problem: A chemist prepares a solution by dissolving .8 mole of NaOH in water to give a 50 ml solution. What is the molarity of this solution?
(C) Sample problem: What is molality of a solution prepared by dissolving 20g MgCl2 in 250 g water?
(D) Sample Problem: What is the mole fraction of the particles contained in a 25% sucrose ?
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