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
VMariaS [17]
3 years ago
5

Calculate the mass of precipitate that forms when 250.0 mL of an aqueous solution containing 35.5 g of lead(II) nitrate reacts w

ith excess sodium iodide solution.
Chemistry
1 answer:
natulia [17]3 years ago
6 0
<h3><u>Answer;</u></h3>

= 49.42 g

<h3><u>Explanation;</u></h3>

The equation for the reaction between Lead (ii) nitrate and sodium iodide;

Pb(NO3)2(aq) + 2 NaI(aq) ---> 2NaNO3(aq) + PbI2(s)

The precipitate formed in this equation is Lead iodide

We first calculate the moles of lead nitrate;

Moles = mass/molar mass

           = 35.5 g/ 331.2 g/mol

           = 0.1072 moles

The mole ratio of Pb(NO3)2 : PbI2 is 1 : 1

Therefore; the number of moles of lead iodide is 0.1072 moles

Mass = moles × molar mass

         = 0.1072 moles × 461.01 g/mol

         <u>= 49.42 g</u>

You might be interested in
What is the valency of aluminum in aluminum chloride? <br>A. 1<br>B.2<br>C.3<br>D.4<br>​
Alinara [238K]

Answer:

C.3

13AL

2.8.3

The number of electrons from the outermost shell is the valence of the element.

5 0
3 years ago
Read 2 more answers
Why does a plastic bottle is sealed at a high altitude change it’s shape when it is taken to low altitude
nadya68 [22]

Answer:

The bonds between the molecules of the plastic bottle become weaker as the altitude decreases.

3 0
3 years ago
A student balances the following redox reaction using half-reactions.
ICE Princess25 [194]
Answer: 6.

Explanation:

1) Aluminum

Al^0-3e^----\ \textgreater \ Al^{3+}

So each atom of aluminum lost 3 electrons to pass from 0 oxidation state to 3+ oxidation state.

2) Manganesium

Mn^{2+}+2e^{-}---\ \textgreater \ Mn

So, each ion of Mn(2+) gained 2 electrons pass from 2+ oxidation state to 0.

3) Balance

Multiply aluminum half-reaction (oxidation) by 2 and multiply manganesium half-raction (reduction) by 3:

2Al^{0}-6e^{-}---\ \textgreater \ 2Al^{3+}&#10;&#10;3Mn^{2+}+6e^{-}---\ \textgreater \ 3Mn^{0}

4) Net equation

Add the two half-equations:

2Al^{0}+3Mn^{2+}----\ \textgreater \ 2Al^{3+}+3Mn^{0}

As you see the left side has 2 Al, 3Mn, and 3*2 positive charges.

The right side has 2 Al, 3 Mn, and 2*3 positive charges.

So, the equation is balanced.

5) Count the number of electrons involved.

As you see 2 atoms of aluminum lost 6 electrons (3 each).

That is the answer to the question. 6 electrons will be lost.
5 0
3 years ago
Read 2 more answers
What causes pressure inside a helium balloon?
kupik [55]

Explanation:

So the gas pressure of a helium balloon arises from the impact of the collisions of the helium atoms between themselves and with the inside surface of the balloon. Of course, the outside atmosphere similarly exerts a pressure on the outside of the balloon.

7 0
3 years ago
Which of the following is true for the actual yield of a reaction?
ludmilkaskok [199]

Answer:

It is always less than the theoretical yield

Explanation:

For many chemical reactions, the actual yield is usually less than the theoretical yield. This is due to possible loss in the process or inefficiency of the chemical reaction.

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement explains why the bonds between non metals tend to be covalent
    10·1 answer
  • Choose the heterogeneous mixture from the list below. gatorade chlorine gas carbon (graphite) black coffee chicken noodle soup
    6·1 answer
  • Why whale vomit is so important?
    12·2 answers
  • Calculate the concentration of all species in a 0.165 m solution of h2co3.
    7·1 answer
  • Na+ and Cl- __________ ___________________________ Na+ and PO4 3- __________ ___________________________ Na+ and SO4 2- ________
    13·1 answer
  • Sodium metal and water react to form hydrogen and sodium hydroxide. If 1.99 g of sodium react with water to form 0.087 g of hydr
    12·2 answers
  • Which of the following best describes the relationship between products and reactants in an exothermic reaction?
    6·2 answers
  • Please help<br>............​
    14·1 answer
  • 4.A high-quality sleeping bag will keep you warm even during a winter camping trip high in the mountains. How do you stay warm w
    15·2 answers
  • Monosaccharides and disaccharides are types of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!