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
n200080 [17]
3 years ago
13

A reaction proceeds with 2.72 moles of magnesium chlorate and 3.14 moles of sodium hydroxide. This is the equation of the reacti

on:
Mg(ClO3)2 + 2NaOH → Mg(OH)2 + 2NaClO3.

Chemistry
2 answers:
Inessa [10]3 years ago
5 0

Answer:

1.57 mol; 3.14 mol

Explanation:

We have the amounts of two reactants, so this is a<em> limiting reactant problem</em>.  

We know that we will need a balanced equation with moles of the compounds involved.  

<em>Step 1</em>. <em>Gather all the information</em> in one place.

           Mg(ClO₃)₂ + 2NaOH ⟶ Mg(OH)₂ + 2NaClO₃

<em>n</em>/mol:      2.72             3.14

<em>Step 2</em>. Identify the <em>limiting reactant</em>

Calculate the moles of Mg(OH)₂ we can obtain from each reactant.  

<em>From Mg(ClO₃)₂</em>: The molar ratio of Mg(OH)₂: Mg(ClO₃)₂ is 1:1 .

Moles of Mg(OH)₂ = 2.72 × 1/1

Moles of Mg(OH)₂ = 2.72mol Mg(OH)₂

<em>From NaOH</em>: The molar ratio of Mg(OH)₂:NaOH is 1:2.

Moles of Mg(OH)₂ = 3.14 × 1/2

Moles of Mg(OH)₂ = 1.57 mol Mg(OH)₂

<em>NaOH is the limiting reactant</em> because it gives the smaller amount of Mg(OH)₂.

<em>Step 3</em>. Calculate the <em>moles of NaClO₃</em>.

The molar ratio of NaClO₃:NaOH is 2:2.

Moles of NaClO₃ = 3.14 × 2/2

Moles of NaClO₃ = 3.14  mol NaClO₃

TiliK225 [7]3 years ago
3 0

Mg(ClO3)2 + 2NaOH → Mg(OH)2 + 2NaClO3.

This is about as hard a question as you can get in beginning chemistry.  You have to figure out which chemical between the two reactants is the LEAST number of moles before you can do anything about the products. Read that sentence over again carefully and keep in mind what least means. It's the key to the entire question.

For every mole of Mg(ClO3)2 you need two moles of NaOH. That's what the balanced equation tells you. The big number on the left of the chemical is where I'm getting 1 to 2. One is in front of Mg(ClO3)2 and 2 is to the left of NaOH

So you have 2.72 moles of Mg(ClO3)2. You would need to have 2.72*2 moles of NaOH which is 5.44 moles of NaOH. Do you have enough NaOH. (I should hear a resounding NO.) So the limiting reactant is NaOH. You only have 3.14 moles of NaOH. Now you can start getting the answer to the question

You now need to set up the same ratio for the Mg(OH)2

For every 2 moles of NaOH you get 1 mole of Mg(OH)2. The proportion is

NaOH/Mg(OH)2 = 2/1

NaOH = 3.14 moles

3.14 / Mg(OH)2 = 2/1     Cross multiply

3.14 = 2 * Mg(OH)2       Divide by 2

3.14/2 = Mg(OH)2          Combine the left

1.57 = Mg(OH)2              Answer  

============

I'll let you work through the second blank. I'm not completely heartless so I'll tell you that the ratio is 1:1 and that the answer should be 3.14

============

Answer Box one = 1.57

Answer Box Two = 3.14


You might be interested in
An element has six valence electrons available for bonding which group of the periodic table does this element most likely belon
professor190 [17]
Elements in groups 16 has six valance electrons.
8 0
3 years ago
Read 2 more answers
1. Explain how groups 1A-8A in the periodic table are organized by their number of valence electrons.
nirvana33 [79]

Explanation:

1. Explain how groups 1A-8A in the periodic table are organized by their number of valence electrons.

The valence electrons in an atom are the outermost shell electrons. They are the most loosely held electrons in an atom.

Coincidentally, the periodic table of elements divided into vertical groups and horizontal periods can be said to be arranged according to the number of valence electrons.

  • Atomic numbers are used to arrange elements on the periodic table.
  • Down a group, the number of electronic shell increases. More electrons are added to new energy levels.
  • As we move from left to right across a period, the number of electrons in elements increases but electronic shell is the same.
  • Down a group electronic shell increases but the number of valence electrons are the same.
  • All elements in Group 1A has just one valence electrons, Group 2A has two valence electrons.........Group 8A has eight valence electrons.
  • Moving across groups is synonymous to moving from left to right on the periodic table.
  • Due to this trend, the periodic table is arranged based on the number of valence electrons.

3. explain how you know the number of valence electrons for each group.

The number of valence electrons in a group is the group number:

   Group      Number                     valence electrons

              1A                                                 1

              2A                                                2

              3A                                                 3

              4A                                                 4

               5A                                                5

               6A                                                6

               7A                                                7

               8A                                                8

learn more:

Periodic table brainly.com/question/1971327

#learnwithBrainly

6 0
3 years ago
The ksp of calcium carbonate, caco3, is 3.36 × 10-9 m2. calculate the solubility of this compound in g/l.
maw [93]
CaCO₃ partially dissociates in water as Ca²⁺ and CO₃²⁻. The balanced equation is,
                       CaCO₃(s) ⇄ Ca²⁺(aq) + CO₃²⁻(aq)
Initial                Y                   -                 -
Change           -X                  +X              +X
Equilibrium      Y-X                 X                X

Ksp for the CaCO₃(s) is 3.36 x 10⁻⁹ M²

                Ksp = [Ca²⁺(aq)][CO₃²⁻(aq)]
3.36 x 10⁻⁹ M² = X * X
3.36 x 10⁻⁹ M² = X²
                    X = 5.79 x 10⁻⁵ M

Hence the solubility of CaCO₃(s) = 5.79 x 10⁻⁵ M
                                                     = 5.79 x 10⁻⁵ mol/L

Molar mass of CaCO₃ = 100 g mol⁻¹

Hence the solubility of CaCO₃ = 5.79 x 10⁻⁵ mol/L x 100 g mol⁻¹
                                                 = 5.79 x 10⁻³ g/L

7 0
3 years ago
Draw the structures of the 3 isomers of C8H18 that contain 3 methyl branches on the main chain, 2 of which are on the same carbo
Vlad1618 [11]

Answer:

Please see the attachments

Explanation:

Please see the attachments below structures of the 3 isomers of C8H18 that contain 3 methyl branches on the main chain, 2 of which are on the same carbon.

3 0
3 years ago
Consider the following equilibrium: 2SO^2(g) + O2(9) = 2 SO3^(g)
saul85 [17]

Answer:

At equilibrium, the forward and backward reaction rates are equal.

The forward reaction rate would decrease if \rm O_2 is removed from the mixture. The reason is that collisions between \rm SO_2 molecules and \rm O_2\! molecules would become less frequent.

The reaction would not be at equilibrium for a while after \rm O_2 was taken out of the mixture.

Explanation:

<h3>Equilibrium</h3>

Neither the forward reaction nor the backward reaction would stop when this reversible reaction is at an equilibrium. Rather, the rate of these two reactions would become equal.

Whenever the forward reaction adds one mole of \rm SO_3\, (g) to the system, the backward reaction would have broken down the same amount of \rm SO_3\, (g)\!. So is the case for \rm SO_2\, (g) and \rm O_2\, (g).

Therefore, the concentration of each species would stay the same. There would be no macroscopic change to the mixture when it is at an an equilibrium.

<h3>Collision Theory</h3>

In the collision theory, an elementary reaction between two reactants particles takes place whenever two reactant particles collide with the correct orientation and a sufficient amount of energy.

Assume that \rm SO_2\, (g) and \rm O_2\, (g) molecules are the two particles that collide in the forward reaction. Because the collision has to be sufficiently energetic to yield \rm SO_3\, (g), only a fraction of the reactions will be fruitful.

Assume that \rm O_2\, (g) molecules were taken out while keeping the temperature of the mixture stays unchanged. The likelihood that a collision would be fruitful should stay mostly the same.

Because fewer \!\rm O_2\, (g) molecules would be present in the mixture, there would be fewer collisions (fruitful or not) between \rm SO_2\, (g) and \rm O_2\, (g)\! molecules in unit time. Even if the percentage of fruitful collisions stays the same, there would fewer fruitful collisions in unit time. It would thus appear that the forward reaction has become slower.

<h3>Equilibrium after Change</h3>

The backward reaction rate is likely going to stay the same right after \rm O_2\, (g) was taken out of the mixture without changing the temperature or pressure.

The forward and backward reaction rates used to be the same. However, right after the change, the forward reaction would become slower while the backward reaction would proceed at the same rate. Thus, the forward reaction would become slower than the backward reaction in response to the change.

Therefore, this reaction would not be at equilibrium immediately after the change.

As more and more \rm SO_3\, (g) gets converted to \rm SO_2\, (g) and \rm O_2\, (g), the backward reaction would slow down while the forward reaction would pick up speed. The mixture would once again achieve equilibrium when the two reaction rates become equal again.

5 0
2 years ago
Other questions:
  • Circle the letter of each expression that has four significant figures. <br> a. 1.25 104 b. 12.51
    15·1 answer
  • The mass of a block is 12 grams and the volume is 6 ml. Calculate the density of the
    15·1 answer
  • What is an example of radioactive decay
    7·1 answer
  • Using the formula for velocity shown below, what is the average velocity of a bicyclist who biked 20 miles north of where he beg
    13·1 answer
  • Suppose now that you wanted to determine the density of a small crystal to confirm that it is sulfur. From the literature, you k
    14·1 answer
  • Chair and Boat Conformers of Cyclohexane (C6H12). Note it is impossible to place all the carbons in the same plane without strai
    7·1 answer
  • A 420 mL sample of a 0.100 M formate buffer, pH 3.75, is treated with 7 mL of 1.00 M KOH. What is the pH following this addition
    14·1 answer
  • How do I explain this? I'm a little stuck. :/
    11·1 answer
  • Calculate the number of total atoms in 195 grams of Ni(OH)2.
    6·1 answer
  • Using the average atomic masses given inside the front cover of this book, calculate the number of atoms present in each of the
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!