# Arrange the solutions in order of decreasing concentration.?

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The following five beakers, each containing a solution of sodium chloride (, also known as table salt), were found on a lab shelf:

Beaker Contents

1 200. ML of 1.50 solution M NaCl

2 100.ML of 3.00 m NaCl solution

3 150.ML of solution containing 19.5 of NaCl

4 100.ML of solution containing 19.5 of NaCl

5 300. of solution containing mol NaCl

1 2 3 4 5

most concentrated least concentrated

19.5 g

sorry

• There is a problem in the given for #5. —-300 ml ? and one mole of NaCL?

In any case, to solve this find the number of moles for each one and calculate the MOLARITY.

For #1, it is already given as 1.5 M

For #2, assuming it is 3.00 moles of the salt, then the molarity is 30 M, a large value.

For #3, convert 19.5 grams to moles which is approximately 0.333 moles. Divide this by the volume you get 2.22 M

For #4, same as #3 but use .100 L for volume and you get 3.33 M

For #5, assuming 300 mL and 1 mole of salt, then it is also 3.33 M

Thus the order is 2 > 4 = 5 > 3 >1.

You may need to clarify #5.

• 4,2,3,5=1

• 19.5… grams or moles or Molar?

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