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
lora16 [44]
4 years ago
7

There are 3 beakers each of which contains saline solution.

Chemistry
1 answer:
Masja [62]4 years ago
8 0

Answer:

  • <em>Percentage concentration of salt in A</em> = <u>5.3%</u>

Explanation:

Assume all the concentrations are expressed in volumetric terms, i.e 10% = 10 liter salt / 100 liter solution, 20% = 20 liter salt / 100 liter soluton, 0% = 0 liters salt.

1) <u>First transformation</u>: 2 liters are from A to B

<u>Solution A</u>:

  • Concentration: 10 % salt ⇒ 10 liter salt / 100 liter solution

  • Volume of solution: 3 liters

  • Volume of salt: 3 liters × 10 liter / 100 liters = 0.300 liter salt

  • Volume of water: 3 liters - 0.300 liters = 2.700 liters solvent

<u>Solution B</u>:

  • Concentraion: 20%

  • Volume of solution: 2 liter

  • Volume of salt: 2 liter × 0.20 = 0.4 liter salt

  • Volume of water: 2 liter - 0.4  liter = 1.6 liter water

<u>Resultant mixture in beaker B</u>: 2 liters of solution A plus 2 liters of solution B

  • Salt: 2 liter × 0.10 + 2 liter × 0.20 = 0.20 + 0.4 = 0.6 liter salt

                             

  • Water: 2 liter × 0.90 + 2 liter × 0.80 = 3.40 liter water

  • Solution: 2 liter + 2 liter = 4 liter solution

  • Concentration: 0.6 liter salt / 4 liter solution = 0.15 = 15%

2) <u>Second transformation</u>: 1 liter transferred from B to C

  • Salt: <u>1 liter × 0.15</u> + <u>0</u> = 0.15 liter salt

                       ↑              ↑

                  (from B)     ( in C)

  • Solution: 1 liter + 4 liter = 5 liter solution

  • Concentration: 0.15 liter salt / 5 liter solution = 0.03 = 3.0%

3) <u>Third transformation</u>: 2 liters are from C to A.

  • Salt: <u>0.03 liter salt × 2 liter solution</u> + <u>1 liter × 0.10</u> = 0.16 liter salt

                                       ↑                                    ↑

                                (from C)                             (in A)

  • Solution: 2 liter + 1 liter = 3 liter solution

  • % of salt in A = (0.16 liter salt / 3 liter solution) × 100 =5.3 %
You might be interested in
True or false, some molecules have the same molecular formula as their empirical formula.
Fiesta28 [93]

Answer:

<u>True</u>, some molecules have the same molecular formula as their empirical formula.

Explanation:

The empirical formula of many compounds may be the same. Formaldehyde, for example, has the chemical formula CH2O, which is equal to the empirical formula of glucose. Each molecule of formaldehyde has one carbon atom, two hydrogen atoms, and one oxygen atom.

3 0
2 years ago
Which nuclide has a half-life that is less than one minute?
Elena-2011 [213]
I think a good strategy for these kind of problems is to just choose the atom with the highest mass number. At any rate, the answer actually is (and I guessed it as) (2) Francium-220. It has a half life of about 30 seconds.
6 0
3 years ago
Read 2 more answers
What is the fundamental idea behind the pH scale? *
jok3333 [9.3K]

Answer:

Whenever the pH of a solution is 7, it will be a neutral solution. Such a solution will have no effect on any litmus solution or any other indicator. pH of an Acidic Solution: All the acidic solutions have a pH of less than 7.

Explanation:

Got it from google

7 0
3 years ago
An element with the smallest anionic (negative-ionic) radius would be found on the periodic table in
Advocard [28]
The correct answer for, An element with the smallest anionic (negative-ionic) radius would be found on the periodic table in, is <span>Group 17, Period 2.</span>
5 0
4 years ago
What is equality and how is it used to write conversion factor
NemiM [27]
Equality is for something to be equal to another thing. 
4 0
4 years ago
Other questions:
  • What is the fluid that fills the inside of the cell❓
    14·1 answer
  • Methane reacts with oxygen to produce carbon dioxide and water. What are the products?
    6·2 answers
  • How many valence electrons are in beryllium?
    10·1 answer
  • Which two statements describe what happens to energy during cellular
    6·1 answer
  • Describe the relationship between the number of valence electrons and the chemical properties of atoms. ?!??!??
    6·1 answer
  • Which of the following is a homogeneous mixture?A) Molten ironB) Stainless steelC) Trail mixD) Water
    5·1 answer
  • Why is water typically used as the heat-absorbing liquid in calorimetry?
    9·1 answer
  • What accounts for the fact that liquid mercury forms into tight beads while ethyl alcohol do not?
    10·1 answer
  • Determine the molarity of the sodium ions when 78.0 g Na2S is dissolved in water for a final volume of 1.0 L.
    9·1 answer
  • CO 2 is an element. true or false
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!