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
Natali [406]
3 years ago
8

Which statement describes KCI(aq)?

Chemistry
1 answer:
weeeeeb [17]3 years ago
4 0

(Aq)ueous means it will always be homogeneous not heterogeneous. So KCl is the solute in a homogeneous mixture.


You might be interested in
1. Show that heat flows spontaneously from high temperature to low temperature in any isolated system (hint: use entropy change
Inga [223]

Answer:

1 ) Δs ( entropy change for hot block ) = - Q / th  ( -ve shows heat lost to cold block )

Δs ( entropy change for cold block ) = Q / tc

∴ Total Δs = ΔSc + ΔSh

                 = Q/tc - Q/th

2) ΔSdecomposition = Δh / Temp = ( 181.6 * 10^3 / 773 ) = 234.928 J/k

Explanation:

<u>1) To show that heat flows spontaneously from high temperature to low temperature </u>

example :

Pick two(2) solid metal blocks with varying temperatures ( i.e. one solid block is hot and the other solid block is cold )

Place both blocks for time (t ) in an insulated system to reduce heat loss or gain to or from the environment

Check the temperature of both blocks after time ( t ) it will be observed that both blocks will have same temperature after time t ( first law of thermodynamics )

Δs ( entropy change for hot block ) = - Q / th  ( -ve shows heat lost to cold block )

Δs ( entropy change for cold block ) = Q / tc

∴ Total Δs = ΔSc + ΔSh

                 = Q/tc - Q/th

<u>2) Entropy change for Decomposition of mercuric oxide </u>

2HgO (s) → 2Hg(l) + O₂ (g)

Δs = positive

there is transition from solid to liquid and the melting point of mercury ( the point at which reaction will take place ) = 500⁰C

hence ΔSdecomposition = S⁻ Hg  -  S⁻ HgO =

Δh of reaction = 181.6 KJ

Temp = 500 + 273 = 773 k

hence ΔSdecomposition = Δh / Temp = ( 181.6 * 10^3 / 773 ) = 234.928 J/k

8 0
2 years ago
For the diprotic weak acid h2a, ka1 = 3.2 × 10-6 and ka2 = 6.1 × 10-9. what is the ph of a 0.0650 m solution of h2a? what are th
Stolb23 [73]
Given:

Diprotic weak acid H2A:
 
Ka1 = 3.2 x 10^-6
Ka2 = 6.1 x 10^-9. 
Concentration = 0.0650 m 

Balanced chemical equation:

H2A ===> 2H+  + A2- 
0.0650       0        0
-x                2x       x
------------------------------
0.065 - x     2x      x

ka1 = 3.2 x 10^-6 = [2x]^2 * [x] / (0.065 - x)

solve for x and determine the concentration at equilibrium. 


5 0
3 years ago
What structure is found in some but not all plant cells
AlekseyPX
The chloroplasts i believe is the answer
5 0
3 years ago
Read 2 more answers
What is the theory that can explain the model of Pangaea?
NISA [10]
The bones of the same animal found out continents far away from each other
4 0
3 years ago
Identify the most common reaction conditions for the dehydration of 2,3-dimethyl-2-pentanol.Select all that apply.A. The presenc
defon

Answer:

D. The presence of a base catalyst.

E. The presence of an acid catalyst. and

F. The presence of heat.

Explanation:

8 0
3 years ago
Other questions:
  • Which of these scenarios involve a reaction that is at equilibrium
    14·2 answers
  • How is the half-life of a radioactive material useful for radioactive dating?
    5·1 answer
  • The only positive ion found in H2SO4(aq) is the
    7·1 answer
  • A 642 mL sample of oxygen gas at 23.5°C and 795 mm Hg, is heated to 31.7°C and the volume of the gas expands to 957 mL. What is
    10·1 answer
  • What is the concentration of an unknown Mg(OH)2 solution if it took an average of 15.4mL of
    15·1 answer
  • What is the bronsted in the following equation HBr+H20 H30+ +Br​
    7·1 answer
  • Is oxygen a beginning substance or ending substance?
    6·2 answers
  • 2. What properties do all acids have?
    10·1 answer
  • The kind of sub-atomic particle that does not make up the nucleus of an atom is:
    12·1 answer
  • The pH of solution A is 7 and the pH of solution B is 5. Solution A has ____ times ______ hydrogen ion concentration compared to
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!