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
Olegator [25]
3 years ago
14

A precipitation reaction is caused by mixing 100. mL of 0.25 M K2Cr2O7 solution with 100. mL of 0.25 M Pb(NO3)2 solution. When t

he precipitate forms, it is filtered from the mixture.Which describes the changes in concentration of the spectator ions K+ and NO3- in the reaction mixture as the reaction occurs?K+ is doubled, NO3- halvedNeither is affectedK+ is halved, NO3- halvedBoth are doubled
Chemistry
1 answer:
Sergeeva-Olga [200]3 years ago
8 0

Answer:

Neither is affected

Explanation:

The reaction occurs as follows:

K₂Cr₂O₇ + Pb(NO₃)₂ → PbCr₂O₇ + 2K⁺ + 2NO₃⁻

That means per mole of reaction you will have two moles of both K⁺ and NO₃⁻.

But volume is also doubled, doing that concentration of spectator ions doesn't change.

Right answer: Neither is affected

I hope it helps!

You might be interested in
What are three types of subatomic particles
saw5 [17]

protons, neutrons, and electrons.

8 0
3 years ago
The number of protons in an atom is called?
Serhud [2]
The thing that it is called is it is called the atomic number of the thing
3 0
3 years ago
Read 2 more answers
Rob measures the solubility of three different salts in water at 22°C. Which type of graph should he use to display his data?. b
sveta [45]
To present his data on the <span>solubility of three different salts in water at 22°C, bar graph should be used since there are different salts and the only variable is the type of salt used. Line graph and scatter plot use two coordinates or variables and is common to comparing data using the same sample while using histogram to find out data distribution is irrelevant.</span>
7 0
3 years ago
Read 2 more answers
A galvanic cell at a temperature of 25.0°C is powered by the following redox reaction:
soldi70 [24.7K]

Answer:

2.01V ( To three significant digits)

Explanation:

First we show the standard reduction potentials of Cu2+(aq)/Cu(s) system and Al3+(aq)/Al(s) system. We can clearly see from the balanced redox reaction equation that aluminium is the anode and was the oxidized specie while copper is the cathode and was the reduced specie. This observation is necessary when substituting values of concentration into the Nernst equation.

The next thing to do is to obtain the standard cell potential as shown in the image attached and subsequently substitute values of concentration and standard cell potential into the Nernst equation as shown. This gives the cell potential under the given conditions.

5 0
3 years ago
A certain ionic compound X has a solubility in water of 40.3 g/L at 20. degrees C. Calculate the mass X of required to prepare 5
tino4ka555 [31]

Answer:

20.1 g

Explanation:

The solubility indicates how much of the solute the solvent can dissolve. A solution is saturated when the solvent dissolved the maximum that it can do, so, if more solute is added, it will precipitate. The solubility varies with the temperature. Generally, it increases when the temperature increases.

So, if the solubility is 40.3 g/L, and the volume is 500 mL = 0.5 L, the mass of the solute is:

40.3 g/L = m/V

40.3 g/L = m/0.5L

m = 40.3 g/L * 0.5L

m = 20.1 g

7 0
3 years ago
Other questions:
  • Which of these equations is balanced? a. 3 H2SO4 + 2Al → Al2(SO4)3 + 3H2 b. 2KCl + Pb(NO3)2 → KNO3 + PbCl2 a b a and b neither
    15·2 answers
  • Cation and anion of CuCl2
    6·1 answer
  • Arrange the following elements from greatest to least tendency to accept an electron.? Rank from greatest to least tendency to a
    8·2 answers
  • Consider the reactionI2(g) + Cl2(g)2ICl(g)Using standard thermodynamic data at 298K, calculate the entropy change for the surrou
    12·1 answer
  • What is an atom in chemistry<br><br>​
    10·2 answers
  • How do you know that an organism belongs to the animal kingdom
    6·1 answer
  • Determine the number of moles of C in each sample
    8·1 answer
  • Which term best describes this reaction? O addition. O Condensation. O elimination. O substitution
    12·1 answer
  • Q3. A new pill (Wardine) has been created that reduces the side effects of the common cold! The
    12·1 answer
  • PLEASE HELP ASAP I'M SO STRESSED
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!