1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andrej [43]
3 years ago
13

In the laboratory, a student adds 19.7 g of barium acetate to a 500. mL volumetric flask and adds water to the mark on the neck

of the flask. Calculate the concentration (in mol/L) of barium acetate, the barium ion and the acetate ion in the solution. [Ba(CH3COO)2] = M [Ba2+] = M [CH3COO-] = M
Calculate the mass, in grams, of iron(II) sulfate that must be added to a 300-mL volumetric flask in order to prepare 300 mL of a 0.181 M aqueous solution of the salt.

grams
Chemistry
1 answer:
Anon25 [30]3 years ago
6 0

Answer:

1) [Ba(CH_3COO)_2]=0.1545 mol/L

[Ba^{2+}]=0.1545 mol/L

[CH_3COO^-]=0.3090 mol/L

2) 21.72 grams of  iron(II) sulfate that must be added.

Explanation:

Molarity=\frac{\text{Moles of compound}}{\text{Volume of solution (L)}}

1) Moles of barium acetate = \frac{19.7 g}{255 g/mol}=0.07725 mol

Volume of the solution was made to 500 ml that 0.5 L

[Ba(CH_3COO)_2]=\frac{0.07725 mol}{0.5L}=0.1545 mol/L

In 1 mole of barium acetate there are 1 mole of barium ions and 2 moles of acetate ions.

[Ba^{2+}]=1\times [Ba(CH_3COO)_2]

[Ba^{2+}]=1\times 0.1545 mol/L=0.1545 mol/L

[CH_3COO^-]=2\times [Ba(CH_3COO)_2]

[CH_3COO^-]=2\times 0.1545 mol/l=0.3090 mol/L

2) Moles of iron(II) sulfate be n

Volume of the solution = 300 mL= 0.3 L

[Fe_2(SO_4)_3]=0.181 M

0.181 M=\frac{n}{0.3 L}

n = 0.0543 moles

Mass of 0.0543 moles of iron(II) sulfate:

0.0543 mol × 400 g/mol = 21.72 g

21.72 grams of  iron(II) sulfate that must be added.

You might be interested in
The edge of the card measures 2.5 inches, what is it in cm?
Citrus2011 [14]

Answer:

6.35 centimeters

Explanation:

<em>2.5 inches</em> = <em>6.35 centimeters</em>

Formula:

  • <em>multiply </em><em>the value in </em><em>inche</em><em>s by the </em><em>conversion</em><em> factor '</em><em>2.54'.</em>

So, 2.5 inches = 2.5 × 2.54 = 6.35 centimeters.

4 0
1 year ago
Which does not affect chemical equilibrium
Amanda [17]
An inert gas will not react with either the reactants or the products, so it will have no effect on the product/reactant ratio, and therefore, it will have no effect on equilibrium.
5 0
3 years ago
Read 2 more answers
Answer Question
vovangra [49]

Answer:

1. an object that has been intentionally placed into orbit. they are called Artificial Satalites.Satanists.

2. a huge collection of gas ,dust and billions of stars and their solar systems held together by gravity.

3. a large object such as Jupiter or Earth that orbits a star. planets are smaller than stars and they do not produce light.

4. July 16, 1969

7 0
3 years ago
Sound waves are created when something is caused to______
neonofarm [45]

Answer: to vibrate

Explanation:

6 0
2 years ago
Molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement of __________.A) the law of multiple
fgiga [73]

Answer:

The correct answer is B.

Explanation:

The molecule of water has 2 atoms of hydrogen and 1 atom of oxygen.

The ratio of masses are given as:

2\times 1 g/mol: 1\times 16 g/mol= 1 : 8

This illustrates the law of definite proportions which is also known as law of constant compositions .

The law states that 'the elements combining to form compound always combine in a fixed ratio by their mass.'

Whereas :

Law of multiple proportion states that when two elements combine with each other to form more than one compounds , the mass of one element with respect to the fixed mass of another element are in ratio of small whole numbers.

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

In a balanced chemical reaction ,total mass on the reactant side must be equal to the total mass on the product side.

Law of conservation of energy states that energy can neither be created nor be destroyed but it can only be transformed from one form to another form.

7 0
3 years ago
Other questions:
  • A substance is seen to be brittle and does not conduct electricity. It is most likely A)a non-metal
    9·1 answer
  • Which law states that the volume and absolute temperature of a fixed quantity of gas are directly proportional under constant pr
    6·1 answer
  • Need help asap got 5 minutes
    15·1 answer
  • What is Keystone XL pipeline?
    7·1 answer
  • How many atoms are there in 0.655 moles of C6H14?​
    7·1 answer
  • . Calculate the pH and the pOH of each of the following solutions at 25 °C for which the substances ionize completely:
    8·1 answer
  • What happens when Magnesium hydroxide is heated? (Decomposition)
    15·2 answers
  • Which elements make up a water molecule?
    11·2 answers
  • A student heated a blue copper sulfate crystal in a test tube. After a few minutes, she observed that the crystal turned white a
    12·1 answer
  • How will the reaction rate of the SN1 reaction change if the electrophile is switched from the tertiary electrophile to a second
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!