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
ivann1987 [24]
3 years ago
12

What is the final concentration of cl- ion when 250 ml of 0.20 m cacl2 solution is mixed with 250 ml of 0.40 m kcl solution? (as

sume additive volumes.)?
Chemistry
1 answer:
serious [3.7K]3 years ago
6 0

CaCl2 and KCl are both salts which dissociate in water when dissolved. Assuming that the dissolution of the two salts are 100 percent, the half reactions are:

<span>CaCl2 ---> Ca2+  +  2 Cl-</span>

KCl ---> K+ + Cl-

Therefore the total Cl- ion concentration would be coming from both salts. First, we calculate the Cl- from each salt by using stoichiometric ratio:

Cl- from CaCl2 = (0.2 moles CaCl2/ L) (0.25 L) (2 moles Cl / 1 mole CaCl2)

Cl- from CaCl2 = 0.1 moles

 

Cl- from KCl = (0.4 moles KCl/ L) (0.25 L) (1 mole Cl / 1 mole KCl)

Cl- from KCl = 0.1 moles

 

Therefore the final concentration of Cl- in the solution mixture is:

Cl- = (0.1 moles + 0.1 moles) / (0.25 L + 0.25 L)

Cl- = 0.2 moles / 0.5 moles

<span>Cl- = 0.4 moles             (ANSWER)</span>

You might be interested in
What is Br mass number?
Fofino [41]

Name Bromine

Symbol Br

Atomic Number 35

Atomic Mass 79.904 atomic mass units

Number of Protons 35

Number of Neutrons 45

Number of Electrons 35

Melting Point -7.2° C

Boiling Point 58.78° C

Density 3.119 grams per cubic centimeter

Normal Phase Gas

Family Halogens

Period 4

Cost $4.90 per 100 grams

3 0
3 years ago
Which statement BEST describes why licensed health care workers are held to a higher standard?
strojnjashka [21]

Answer:

They agree to ethical standards when they are licensed.

Explanation:

4 0
3 years ago
Which is equal to a temperature of 50°F?<br> O 18°C<br> O 46°C<br> O 10°C<br> O 32°C
Alekssandra [29.7K]
C) 10°C

50-32= 18
18 x 5/9=10
8 0
3 years ago
Read 2 more answers
A lake in California contains about 8,500,000,000,000 gallons of water. How can this
aniked [119]

Answer:

8.5 * 10^11

Explanation:

8 0
3 years ago
The following is a Limiting Reactant problem: Magnesium nitride is formed in the reaction of magnesium metal with nitrogen gas i
Fynjy0 [20]

Answer: you would 3Mg+N2g and multiply that by 2.0+8.0

4 0
3 years ago
Read 2 more answers
Other questions:
  • How many molecules are in the quantities below.? 2.0 moles
    5·1 answer
  • Two well-known complex ions containing ni are [ni(h2o)6]2+, which is green, and [ni(en)3]2+, which is purple. which one of these
    10·1 answer
  • HELP i will give crown and 15 points
    7·2 answers
  • Which cell i this illustration is likely to come from a plant?
    10·2 answers
  • What is the name of the gas law relating pressure and volume at a<br> constant temperature?
    12·1 answer
  • HI. I have a lizared and dont know what to feed it. me and my sis were playing one day and found a small lizared. WHAT DO THEY E
    6·1 answer
  • True or false.  As a wave travels through a given material its velocity changes.
    7·2 answers
  • When 80.0 grams of calcium chloride react with silver nitrate, how many grams of silver
    5·1 answer
  • You collect 552 mL of argon gas at 23.0 C. What volume will the gas occupy at 46.0C if the pressure remains constant?
    7·1 answer
  • The following reaction: HF(aq) &lt;--&gt; H+(aq) + F-(aq) has an equilbirum constant (K) value of 7.2 x 10-4. This means that th
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!