3-2 Map You\'d like to prepare 250.0 mL of a 0.1840 M NaCI solution using a volu

Question

3-2

Map You'd like to prepare 250.0 mL of a 0.1840 M NaCI solution using a volumetric flask What mass of NaCI will you need? Number What procedure should you use to make the solution with a 2500 mL lask? Put the steps in order. You may not use all labels, and you may not require all the steps Step 1volume of 250 0mil-and mix Step 2 Step 3 Add more water stll under a tota Hold the cap frmly in place and invert the fask many times Dissolve the ahove amount of NaC in less than 200 mL of water, and mis wel Step 4 ion with war to the 250 0 nak Step 5 Dissove e above amount of Nac 250 ml of water

Explanation / Answer

V = 250 ml of

M = 0.184 M of Nacl

first, find mol

mol = M*V = 0.184*0.25 = 0.046 mol

mass = mol*MW = 0.046*58 = 2.668 g of NaCl

then

steps:

in the flask, add the 2.668 g of salt

then dilute with water until mark is V = 250 ml

sitrr,

make sure V = 250 ml

then you are done

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