Chemistry, 24.03.2020 02:32 rainboworld3994

Suppose of barium acetate is dissolved in of a aqueous solution of sodium chromate. Calculate the final molarity of acetate anion in the solution. You can assume the volume of the solution doesn't change when the barium acetate is dissolved in it. Be sure your answer has the correct number of significant digits.

Answers: 3

Show answers

Answers

Answer from: issagirl05

The question is incomplete, here is the complete question:

Suppose 2.19 g of barium acetate is dissolved in 150. mL of a 0.10 M aqueous solution of sodium chromate. Calculate the final molarity of acetate anion in the solution. You can assume the volume of the solution doesn't change when the barium acetate is dissolved in it. Be sure your answer has the correct number of significant digits.

The final molarity of acetate ions in the solution is 0.115 M

Explanation:

For barium acetate:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of barium acetate = 2.19 g

Molar mass of barium acetate = 255.43 g/mol

Putting values in above equation, we get:

$\text{Moles of barium acetate}=\frac{2.19g}{255.43g/mol}=0.0086mol$

For sodium chromate:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$ .....(1)

Molarity of sodium chromate solution = 0.10 M

Volume of solution = 150 mL = 0.150 L (Conversion factor: 1 L = 1000 mL)

Putting values in equation 1, we get:

$0.10M=\frac{\text{Moles of sodium chromate}}{0.150L}\\\\\text{Moles of sodium chromate}=(0.10mol/L\times 0.150L)=0.015mol$

The chemical equation for the reaction of barium acetate and sodium chromate follows:

$Ba(CH_3COO)_2+Na_2CrO_4\rightarrow BaCrO_4+2CH_3COONa$

By Stoichiometry of the reaction:

1 moles of barium acetate reacts with 1 mole of sodium chromate

So, 0.0086 moles of barium acetate will react with = $\frac{1}{1}\times 0.0086=0.0086mol$ of sodium chromate

As, given amount of sodium chromate is more than the required amount. So, it is considered as an excess reagent.

Thus, barium acetate is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 moles of barium acetate produces 2 moles of sodium acetate

So, 0.0086 moles of barium acetate will produce = $\frac{2}{1}\times 0.0086=0.0172moles$ of sodium acetate

1 mole of sodium acetate produces 1 mole of sodium ions and 1 mole of acetate ions

Now, calculating the molarity of acetate ions by using equation 1:

Moles of acetate ions = 0.0172 moles

Volume of solution = 0.150 L

Putting values in equation 1, we get:

$\text{Molarity of }CH_3COO^-\text{ ions}=\frac{0.0172mol}{0.150L}\\\\\text{Molarity of }CH_3COO^-\text{ ions}=0.115M$

Hence, the final molarity of acetate ions in the solution is 0.115 M

Answer from: Quest

c, liquids evaporate, creating a gas

Answer from: Quest

The dispersed phase is liquid and dispersed medium in milk is liquid

Another question on Chemistry

Chemistry, 22.06.2019 07:30

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.

Answers: 2

Answer

Chemistry, 22.06.2019 08:00

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Answers: 2

Answer

Chemistry, 22.06.2019 11:00

What is the temperature of 0.750 mol of a gas stored in a 6,850 ml cylinder at 2.21 atm? . 2.95 k 5.24 k 138 k 246 k

Answers: 3

Answer

Chemistry, 22.06.2019 20:00

How many moles are in 123.0 grams of kclo4?

Answers: 1

Answer

You know the right answer?

Suppose of barium acetate is dissolved in of a aqueous solution of sodium chromate. Calculate the fi...