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2 years ago

6. A 3 liter solution contains 140 g of Sodium Bromide (NaBr). What is the molarity of the solution?

Chemistry

1 answer:

Ludmilka [50]2 years ago

8 0

The molarity = 0.454 M

<h3>Further solution</h3>

Given

Volume = 3 L of solution

mass = 140 g of NaBr

Required

The molarity

Solution

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

$\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}$

mol of NaBr :

= mass : MW

= 140 g : 102,894 g/mol

= 1.361

Molarity :

= 1.361 mol : 3 L

= 0.454 M

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Explanation :

Step 1 : Find moles of crystal violet and NaOH.

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Molarity of crystal violet = $3.00 \times 10^{-3} = \frac{mol (CrystalViolet)}{L}$

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NaOH is a strong base and dissociates completely as follows.

$NaOH (aq) \rightarrow Na^{+} (aq) + OH^{-} (aq)$

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