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
givi [52]
3 years ago
6

For a particular redox reaction, Cr is oxidized to CrO 2 − 4 and Ag + is reduced to Ag . Complete and balance the equation for t

his reaction in basic solution. The phases are optional. balanced reaction: Cr + Ag^{+} -> CrO_{4}^{2}^{-} + Ag Cr + Ag + ⟶ CrO 2 − 4 + Ag
Chemistry
1 answer:
Sunny_sXe [5.5K]3 years ago
7 0

Answer:

6Ag⁺ + Cr + 8OH⁻ → 6Ag + CrO₄²⁻ + 4H₂O

Explanation:

We can balance the redox reaction of Cr and Ag⁺, in terms of two half-reactions, one for Ag⁺ and other for Cr:

Ag⁺   →   Ag      

In the above equation we need to balance the number of electrons, we know that the Ag⁺ is being reduced to Ag, so the reaction is:

Ag⁺ + e⁻ →  Ag   (1)

Now, we need to balance the half-reaction of Cr:

Cr   →  CrO₄²⁻  

From above, we know that the Cr is being oxidated to CrO₄²⁻, so we need to balance the number of electrons and the number of oxygen atoms. The Cr⁰ is being oxidated to Cr⁶⁺, so for the electron balance, we need to add 6e⁻ to the right side of the equation. Since the reaction is in a basic medium, the oxygen atoms will be balanced with OH⁻ ions as follows:          

Cr + OH⁻ →  CrO₄²⁻ + 6e⁻  

The hydrogen atoms will be balanced using H₂O molecules:  

Cr + OH⁻ →  CrO₄²⁻ + 6e⁻ + H₂O    

The balanced equation is:

Cr + 8OH⁻ →  CrO₄²⁻ + 6e⁻ + 4H₂O   (2)

Since the reaction (1) involves 1 electron and the reaction (2) involves 6 electrons, by increasing the reaction (1) six times and by the addition of the two reactions (1 and 2) we can have the net redox reaction:

6*(Ag⁺ + e⁻ →  Ag)  

<u>Cr + 8OH⁻ →  CrO₄²⁻ + 6e⁻ + 4H₂O</u>

6Ag⁺ + Cr + 8OH⁻ → 6Ag + CrO₄²⁻ + 4H₂O                  

Therefore, the net equation is: 6Ag⁺ + Cr + 8OH⁻ → 6Ag + CrO₄²⁻ + 4H₂O.

I hope it helps you!

You might be interested in
What is the percent composition of hydrogen in water
pshichka [43]

Answer:

11.19% hydrogen and 88.81% oxygen

Explanation:

6 0
3 years ago
An order calls for Hytone 1% cream, Lotrimin 1% cream, aa q.s. How many grams of Lotrimin cream would be needed to make a total
Ainat [17]

The words aa q.s. is an abbreviation which is used in pharmacy. This is usually written by prescribers and then translated by pharmacists. The aa is derived from Latin which means “of each” while q.s. is also derived from Latin which means “a sufficient quantity”. This simply means that there is equal amount of Hytone 1% cream and Lotrimin 1% cream in the total cream formulation.

Since we are to make a total of 60 g of cream, therefore 50% of it would be Lotrimin cream.

Amount of Lotrimin cream needed = 0.5 (60 g)

<span>Amount of Lotrimin cream needed = 30 grams</span>

7 0
3 years ago
Read 2 more answers
Which factor is a characteristic of an acid?
Elina [12.6K]

anything that turns red litmus paper to blue it is an acid and vice versa is true

4 0
3 years ago
What is parthenolide
vovangra [49]
Parthenolide is a sesquiterpene lactone which occurs naturally in the plant feverfew--highly concentrated in the flowers and fruit.
7 0
3 years ago
How many moles are in 18.3 g of CO2?
kaheart [24]

Answer:

0.416moles

Explanation:

Using the formula;

number of moles = mass ÷ molar mass

Molar mass of CO2 = 12 + 16(2)

= 12 + 32

= 44g/mol

According to the information in this question, there are 18.3g of CO2

number of moles (n) = 18.3/44

= 0.4159

= 0.416moles of CO2

7 0
3 years ago
Other questions:
  • The amount of heat absorbed when 5.5g of aluminum is heated from 25.0c to 95.0c the specific heat of aluminum is 0.897J/(gc)​
    9·1 answer
  • The elements lithium and oxygen react explosively to from lithium oxide (Li2O). How much lithium oxide will form if 3.03 mol of
    13·1 answer
  • Class science A revolution occurs:
    15·2 answers
  • Easy Help Please!!!!!!
    12·1 answer
  • temperature is the transfer of thermal energy from one object to another. Please select the best answer from the choices provide
    8·1 answer
  • When calculating percent error, the accepted value is in the denominator <br> True or false
    8·2 answers
  • Which solution when mixed with a drop ofbromthymol blue will cause the indicator to change from blue to yellow
    5·2 answers
  • Is a girl doing any work while she stands still and holds a box? Why or why not?
    11·1 answer
  • What is the mole ratio between oxygen and carbon dioxide?<br><br> C25H52 + 38 O2 → 25 CO2 + 26 H2O
    10·1 answer
  • How would you measure the melting point of a solid that melts above 100.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!