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
ozzi
3 years ago
7

A 25.00 mL solution of 0.150 M NaCl is combined with 10.00 mL of a 0.0750 M CaCl2 solution. Assuming a total volume of 35.00 mL,

determine the concentration of chloride ion in the combined solution.
Chemistry
1 answer:
Rudiy273 years ago
5 0

Answer:

[Cl⁻] = 1,5x10⁻⁴M

Explanation:

First of all, let's determinate the mole of each salt.

Molarity . volume = Mole

Volume must be in L, cause molarity is mol/L

NaCl  → Na⁺  + Cl⁻

Ratio is 1:1

0.15 mol/L . 0.025L = 3.75x10⁻³ mole

As ratio is 1:1, from 3.75x10⁻³ mole of salt, I have 3.75x10⁻³ mole of chloride

CaCl₂ → Ca²⁺  +  2Cl⁻

Ratio is 1:2 so, from 1 mol of salt I'll get the double of mole of chloride

0.075 mol/L . 0.010 L = 7.5x10⁻⁴ mol

7.5x10⁻⁴ mol . 2 = 1.5x10⁻³ mole

Total mole of Cl⁻:  3.75x10⁻³ +  1.5x10⁻³  = 5.25x10⁻³

This 5.25x10⁻³ mole are present in a total volume of 35 mL.

Let's convert 35 mL in L → 0.035L   (35/1000)

Molarity is mol/L → 5.25x10⁻³ mol / 0.035L = 1,5x10⁻⁴M

You might be interested in
How many molecules are in 7V205?​
elixir [45]

Answer:

Calculate the number of moles you have by taking the Mass / molar mass. if you have 1000 grams ; then 1,000 g / 151.001 g/mol = X g moles. Then multiply by Avogadros # = 6.022140857 × 10^23 molecules per g mole. The result is the # of molecules of MnSO4

Explanation: Hope this helps

7 0
2 years ago
Its eeeeeeeeeeeezzzzzzzzzzzzzzzz science
artcher [175]

Answer:

B

Explanation:

Meters squared would be a good unit of measurement for Sanjeev's purposes.

4 0
3 years ago
During the hot summer days, there is a lot more water in the air. This is due to which change of state?
Zarrin [17]
With the evaporation
5 0
3 years ago
21.7 mL of gas at 98.8 kPa is allowed to expand at constant
IRISSAK [1]

Answer: 40.68 kPa

Explanation:

Given that,

Original volume of gas V1 = 21.7 mL

Original pressure of gas P1 = 98.8 kPa

New volume of gas V2 = 52.7 mL

New pressure of gas P2 = ?

Since pressure and volume are given while temperature is constant, apply the formula for Boyle's law

P1V1 = P2V2

98.8 kPa x 21.7 mL = P2 x 52.7L

2143.96 kPa L = 52.7 L x P2

P2 = 2143.96 kPa L / 52.7 L

P2 = 40.68 kPa

Thus, the new pressure of the gas is 40.68 kPa.

5 0
3 years ago
If the molar heat of combustion of liquid benzene at constant volume and 300k is -3272KJ. Calculate the heat of combustion at co
vladimir2022 [97]

Answer:

The heat at constant pressure is -3,275.7413 kJ

Explanation:

The combustion equation is 2C₆H₆ (l) + 15O₂ (g)  → 12CO₂ (g) + 6H₂O (l)

\Delta n_g = (12 - 15)/2 = -3/2

We have;

\Delta H = \Delta U + \Delta n_g\cdot R\cdot T

Where R and T are constant, and ΔU is given we can write the relationship as follows;

H = U + \Delta n_g\cdot R\cdot T

Where;

H = The heat at constant pressure

U = The heat at constant volume = -3,272 kJ

\Delta n_g = The change in the number of gas molecules per mole

R = The universal gas constant = 8.314 J/(mol·K)

T = The temperature = 300 K

Therefore, we get;

H = -3,272 kJ + (-3/2) mol ×8.314 J/(mol·K) ×300 K) × 1 kJ/(1000 J) = -3,275.7413 kJ

The heat at constant pressure, H = -3,275.7413 kJ.

4 0
2 years ago
Other questions:
  • Which of the following processes takes place inside the sun
    5·2 answers
  • PLEASE HELP ME ON HERE HAVING TROUBLE!!!!<br> What errors tend to lead to pseudoscience?
    6·1 answer
  • Brandy has built a computer model of a weather system. She has included information about bodies of water, the Sun, and the atmo
    8·1 answer
  • Quick little question :)
    14·1 answer
  • All formulas of mole concept​
    8·1 answer
  • Calculate molar concentration of formic acid solution if degree of dissociation is 4% K(HCOOH)=2.10^_4
    6·1 answer
  • The asthenosphere is more viscous and thick than the mesosphere<br>TRUE OR FALSE?
    12·1 answer
  • if 3mol of carbon dioxide are used up in the photosynthesis reaction, what mass of glucose will be produced?​
    13·1 answer
  • If a negatively charged ion is more concentrated outside the cell, the forces required to balance the chemical gradient would be
    8·1 answer
  • Which of the following best describes the atmosphere of a planet?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!