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
Marina86 [1]
2 years ago
12

Chromium (VI) forms two different oxyanions, the orange dichromate ion, Cr2o72-, And the yellow chromate ion, CrO4 2-. The equil

ibrium reaction between the ions is:
Cr2O7 2- (aq) + H2O(l)→ 2CrO4 2-(aq) + 2H(aq)
Explain
a) Why does the orange dichromate solution turn yellow when sodium hydroxide is added. Write the net ionic equation for this shift.
b) How will this system shift at equilibrium if the temperature is increased
Chemistry
1 answer:
MrRissso [65]2 years ago
4 0

Answer:

See explanation

Explanation:

Let us look at the reaction again;

Cr2O7 2- (aq) + H2O(l)⇄ 2CrO4 2-(aq) + 2H^+(aq)

When we add sodium hydroxide to the system as shown, the hydroxide ion removes the hydrogen ion thereby leaving a large concentration CrO4^2-(aq) in the system this causes the solution to turn green(equilibrium position shifts to the right).

The net ionic equation is;

OH^-(aq) + H^+(aq) ----> H2O(l)

The reaction;

OH^-(aq) + H^+(aq) ----> H2O(l) is exothermic hence, if the temperature of the system is increased, the equilibrium position will shift towards the left hand side and the solution turns orange.

You might be interested in
What happens when an acid reacts with a base?
shepuryov [24]

Answer:

They neutralize each other

3 0
2 years ago
Read 2 more answers
PLEASE HURRY I'M TIMED
cricket20 [7]
You should give a picture of the fable!
5 0
2 years ago
What mass of solute is contained in 25.4 ml of a 1.56 m potassium bromide solution?
mash [69]
Answer is: mass of <span>potassium bromide is 4.71 grams.
V(KBr) = 25.4 mL </span>÷ 1000 mL/L = 0.0254 L, volume of solution.
c(KBr) = 1.56 mol/L.
n(KBr) = c(KBr) · V(KBr).
n(KBr) = 1.56 mol/L  0.054 L.
n(KBr) = 0.0396 mol, amount of substance.
m(KBr) = n(KBr) · M(KBr).
m(KBr) = 0.0396 mol · 119 g/mol.
m(KBr) = 4.71 g.
M - molar mass.
3 0
3 years ago
Read 2 more answers
Why the bonds between nonmentals tend to be covalent
natita [175]
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
7 0
3 years ago
Which pair of kingdoms include organisms which are all multicellular?
blondinia [14]
The animal kingdom includes <span>multicellular organisms. Also the cells of the species in this kingdom have a nucleus but no chloroplasts or cell wall. </span>
It is the largest of all of the six kingdoms and includes mammals, birds, reptiles, insects and more.
Other kingdom from which all organisms are multicellular is t<span>he plant kingdom. It includes all types of plants including mosses, flowering plants, and ferns. </span>
7 0
3 years ago
Other questions:
  • Describe a process in which energy changes form at least two times explain how the law of conservation of energy applies to the
    15·1 answer
  • Word Bank: automobiles, fossil fuels, plastic packaging, planes, trains _________________________ requires oil to create it.
    8·1 answer
  • Enlista cuatro compuestos del carbono,naturales y sintéticos, de uso en la vida cotidiana
    13·2 answers
  • Which best describes the same pattern of tides on earth throughout the day?
    13·2 answers
  • how many calories of energy are given off to lower the temperature of 100.0g of iron from 150.0°C to 35.0°C?
    8·1 answer
  • What does the bottom number within each box of the periodic table refer to? How can it be used to determine the number of neutro
    11·1 answer
  • In order to predict the outcome of the reaction, write the molecular, full ionic, and net ionic equations for a mixture of aqueo
    9·1 answer
  • Please help due soon.
    7·2 answers
  • Determine the number of protons, neutrons, and electrons in the following:
    11·1 answer
  • According to the article, puberty indicates the beginning of adolescence. How does nutrition influence the start of adolescence?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!