Southeast Missouri StatexC Chegg Study | Guided So x C Not secure www.saplinglea

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Southeast Missouri StatexC Chegg Study | Guided So x C Not secure www.saplinglearning.com/ibiscms/mod/ibis/view.php?id-6182346 Sapling Learning Jump to... BreAnna Ward macmillan leearriing 1 100 Question 14 of 20 Available From: 8/27/2018 02:00 PM Map Due Date: 9/10/2018 11:59 PM Sapling Learning Points Possible: 5 You'd like to prepare 250.0 mL of a 0.1720 M NaCl solution using a volumetric flaslk What mass of NaCI will you need? Grade Category Default Description: Chapter 1 Problem Set Policies: Number Fall 2014 Policy You can check your answers. You can view solutions after the due date You can keep trying to answer each questi until you get it right or give up. You lose 5% of the points available to each answer in your question for each incorrect attempt at that answer For multiple-choice questions, the penalty depends on the number of choices availab What procedure should you use to make the solution with a 250.0 mL flask? Put the steps in order. You may not use all labels, and you may not require all the steps. Step 1 Step 2 Dilure the soluton with water to the 250.0 mL Hold the cap timly in place and invert the flask rmary times Dissolvg the abowe amount of NaCI n 250 mL of water 10 1 Step 3 Dissolvr the ahove amaunt of NaCl in less than 250 mL of water, and mix well Add more water still under a total volume of 2500 mL-3nd mix Step 4 eTextbook 13 Step 5 OHelp With This Topic 14 0 Web Help & Videos Previous check AnswerNext Exit 15 Hint 8:55 PM Type here to search 9/10/2018 5

Explanation / Answer

i)

Answer

2.5129g

Explanation

Molarity = no of moles of solute per liter of solution

No of moles of NaCl required for 1000ml = 0.1720

No of moles of NaCl required for 250ml = 0.043

No of moles = mass/molar mass

mass of NaCl = 0.043mol× 58.44g/mol = 2.5129g

ii)

Step 1 : Dissolve the above amount of NaCl in less than 250ml of water and mix well

step 2 : Add more water - still under a total volume of 250ml - and mix

step 3: Dilute the solution with water to the 250ml

step 4: Hold the cap firmly in place and invert the flask many times.

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