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
azamat
3 years ago
14

Did an oxidation-reduction reaction occur in the reaction between copper sulfate and sodium sulfide?

Chemistry
2 answers:
salantis [7]3 years ago
7 0

1. It's not gonna be A, B, or C because  redox means when the electrons transfer both ways and a b and c dont show that. Bw d and E i'd go for D.

for 2.

I'd say B  because both reactants are acqueous while 1 product is solid so it would probably precipitate.



good luck dadddddd

azamat3 years ago
5 0

<em>Redox question </em>

Answer:

D. This is not a redox reaction because no electrons were transferred.

<em>Explanation</em>:

We can check whether a reaction is a redox reaction by determining the oxidation number of each atom on both sides of the arrow.

\stackrel{\hbox{+2}}{\hbox{Cu}}\stackrel{\hbox{+6}}{\hbox{S}}\stackrel{\hbox{-2}}{\hbox{O}}_{4} + \stackrel{\hbox{+1}}{\hbox{Na }}_{2}\stackrel{\hbox{-2}}{\hbox{S}} \longrightarrow \stackrel{\hbox{+2}}{\hbox{Cu}}\stackrel{\hbox{-2}}{\hbox{S}} + \stackrel{\hbox{+1}}{\hbox{Na}}_{2}\stackrel{\hbox{+6}}{\hbox{S}}\stackrel{\hbox{-2}}{\hbox{O}}_{4}

The oxidation number does not change for <em>any</em> atom, so this is not a redox reaction.


<em>Precipitation question </em>

Answer:

B.  CdSO₄(aq) + K₂S(aq) → CdS(s) + K₂SO₄(aq)

Explanation:

A precipitation reaction occurs when an insoluble solid forms from the reaction of two substances in a solution.

This is the only reaction that forms a solid from two soluble reactants.

You might be interested in
A water sample has a pH of 8.2 and a bicarbonate concentration of 97 mg/L. What is the alkalinity of the sample in moles/L and i
goldfiish [28.3K]

Answer:6.94

Explanation:

Molar mass of CaCO3=40+12+16×3

=40+12+48=100g/mol

Moles=mass of substance/molar mass

=97mg/100g=0.097/100=0.00097moles/L.

PH=-log[CaCo3]=-log(0.00097)=6.94

P.s it's log to base e

3 0
3 years ago
Which of the following is the correct wedge and dash conformation for the following Newman projection?
kakasveta [241]

We have that  the correct wedge and dash conformation for the following Newman projection is

IV

From the Diagrams above

Two CH_3 groups points on opposite sides in plane

Two Br are on same side  of plane

Two H also on same side of the plane so the plausible  structure is IV

Therefore

The Correct option is IV

For more information on this visit

brainly.com/question/17756498?referrer=searchResults

8 0
3 years ago
≡↔∛ππΔ≅×π⊄∴<br>khvjh j hjgvvvvvvvvvvvvvh jh
cupoosta [38]

its 40

I just took the test right now to get this answer

7 0
3 years ago
What are two factors that affect an objects kinetic energy
Bad White [126]
Potential energy and height; best guess;)
8 0
3 years ago
Read 2 more answers
Q+ is an ion of element Q. What has the highest value in the ion?
Firdavs [7]

The highest value of the ion is the nucleon number. The correct option is a.

<h3>What is nucleon number?</h3>

The mass number of an element is so named because it represents the total number of protons and neutrons in the element.

The total number of protons and neutrons in an atomic nucleus is known as the mass number, also known as the atomic mass number or nucleon number. It is roughly equivalent to the atomic mass expressed in atomic mass units.

In the given ion Q+, the nucleon number has the highest value in the ion

Thus, the correct option is a.

For more details regarding nucleon number, visit:

brainly.com/question/14622763

#SPJ1

7 0
1 year ago
Other questions:
  • What is 7.09x10 to the 5 minus 6.10xto the 4 in scientific notation
    6·1 answer
  • Buffer preparation. You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acid plus acet
    10·1 answer
  • Under which circumstance might a gas decrease in volume when heated? A)The gas is held constant at STP. B)The gas remains under
    7·1 answer
  • Explain why atoms are always neutral in charge.
    11·1 answer
  • What are atoms made of
    8·2 answers
  • (Chemistry question)
    9·1 answer
  • Which of the following questions is a scientific question?
    13·2 answers
  • We can also use the equation for enthalpy change for physical phase changes. Consider the phase change H2O(l) → H2O(g). Calculat
    15·2 answers
  • Down the defini<br> Astronomy<br> Zoology sa
    11·1 answer
  • The observation that 20g of hydrogen gas always combines with 160g of oxygen gas to form 180g of water, even when there is more
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!