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
Inessa05 [86]
2 years ago
7

what is the molarity of 20.0 ml of a KCl solution that reacts completely with 30.0 ml of a 0.400 M Pb(NO3)2 solution?

Chemistry
1 answer:
Alex17521 [72]2 years ago
7 0

Answer:

[KCl] = 1.2 M

Explanation:

We need to complete the reaction:

2KCl(aq) + Pb(NO₃)₂(aq)  → 2KNO₃(aq) + PbCl₂(s)↓

By stoichiomety we know that 1 mol of chloride needs 1 mol of nitrate to react:

Let's find out the moles of nitrate, we have:

Molarity = mol/volume(L)

We convert the volume → 30 mL . 1L/1000mL = 0.030L

Molarity . volume(L) = moles → 0.400 M . 0.030L = 0.012 moles

Therefore, we can make a rule of three.

1 mol of nitrate reacts with 2 moles of chloride

Then, 0.012 moles of nitrate must react with (0.012 . 2) / 1 = 0.024 moles of KCl

We convert the volume from mL to L → 20 mL . 1L /1000mL = 0.020L

Molarity = mol /volume(L) → 0.024 mol /0.020L = 1.2 M

You might be interested in
Study the figures below which illustrate the steps in the following chemical reaction:
Tanya [424]

Answer:

Hello - this is Mrs. Gussman, your chemistry teacher.  I wrote this exam question and posting it online is a violation of the academic integrity policy.  Remove this post immediately.

Explanation:

7 0
2 years ago
Stomach acid is predominately hydrochloric acid. Write the balanced chemical equation for the neutralization reaction between HC
bogdanovich [222]

Answer:

HCl + Mg(OH2)  ---> MgCl2 + H2O

Explanation:

hydrochloric acid + magnesium hydroxides  ==> magnesium Chloride (a salt) + Water

HCl + Mg(OH2)  ---> MgCl2 + H2O

8 0
2 years ago
What is the molecular geometry for KrF2?
Nikitich [7]
<span><span>KrF2‡ </span>5 <span>trigonal bipyramid</span></span>
8 0
3 years ago
Crystals are made using supersaturated solutions of solids in water. These solutions hold more of the solute than they would
KiRa [710]

Supersaturated solutions hold more of the solute at higher temperatures than they would at room temperature. Hence, the correct answer would be that the water would need to be heated to a higher temperature, which would give molecules and ions more  kinetic energy, increasing solubility.

Generally, solubility increases with increase in temperature. At higher temperature, the kinetic energy of molecules in solution increase. Consequently, more of the molecules/ions of solutes collide more with each other and dissolve. At lower temperature, the molecules of the solutes crystalize out in solution.

More on solubility can be found here: brainly.com/question/22185953

3 0
2 years ago
The bond that would form between Cs and Cl can be described as A an ionic bond because both atoms are strongly attracted to each
VashaNatasha [74]
Answer is: B an ionic bond because the Cl atom pulls electrons off the Cs atom resulting in a positive ion and negative ion that are attracted to each other.
Ceasium is alkaline metal, with low electronegativity, which means it easily gives one electron, and forms positive cation and chlorine is nonmetal, with high electronegativity, it gains electron and forms negative anion.
3 0
3 years ago
Other questions:
  • In general, ionization energy will
    12·2 answers
  • 4. If an experimental value for a given observation was 415 nm while the theoretical value
    14·1 answer
  • What does a scientist observe in a chemical's reaction rate?
    6·2 answers
  • Can someone please help me with this
    10·2 answers
  • Identify reagents necessary to convert cyclohexane into 1,3-cylohexadiene: notice that the starting material has no leaving grou
    11·1 answer
  • Exercise 2:
    13·1 answer
  • What is used to measure the energy in a chemical reaction?
    8·2 answers
  • What is different between elastic energy, kinetic energy, and gravitational energy?
    8·1 answer
  • ? Match the states of matter to their properties. Drag the items on the left to the correct location on the right. solids Indefi
    13·1 answer
  • What’s the purpose ?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!