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Helen [10]
3 years ago
5

Complete and balance the equation for the following acid-base neutralization reaction. If water is used as a solvent, write the

reactants and products as aqueous ions. In some cases, there may be more than one correct answer, depending on the amount of reactants used.
(a)Mg(OH)2 + HClO4?
(b)SO3 + H2O? (Assume an excess of water and that the product dissolves)
(c) SrO + H2SO4?
Chemistry
1 answer:
Zinaida [17]3 years ago
7 0

Explanation:

A balanced equation is defined as the one that has equal number of atoms of all the elements present on both reactant and product side.

(a) Mg(OH)_{2} + HClO_{4} \rightarrow Mg(ClO_{4})_{2} + H_{2}O

Number of atoms on reactant side are as follows.

Mg = 1

O = 6

H = 3

Cl = 1

Number of atoms on product side are as follows.

Mg = 1

O = 9

H = 2

Cl = 2

So, to balance this equation we multiply Mg(OH)_{2} by 2 on reactant side and multiply H_{2}O by 2 on product side.

Therefore, the balanced reaction equation is as follows.

       2Mg(OH)_{2} + HClO_{4} \rightarrow Mg(ClO_{4})_{2} + 2H_{2}O  

(b)  SO_{3} + H_{2}O \rightarrow H_{2}SO_{4}

Number of atoms on reactant side are as follows.

S = 1

O = 4

H = 2

Number of atoms on product side are as follows.

S = 1

O = 4

H = 2

Therefore, this equation is balanced as it has same number of atoms on both reactant and product side.

(c)   SrO + H_{2}SO_{4} \rightarrow SrSO_{4} + H_{2}O

Number of atoms on  reactant side are as follows.

Sr = 1

O = 1

H = 2

S = 1

O = 4

Number of atoms on product side are as follows.

Sr = 1

O = 1

H = 2

S = 1

O = 4

Therefore, this equation is balanced.

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saveliy_v [14]

2. Example of electromagnetic energy is X-Rays.

Type of electromagnetic energy is radiation/ gamma rays.

3. Example of electromagnetic energy is Radio.

Type of electromagnetic energy is Electromagnetic spectrum

Explanation:

  • Electromagnetic Energy Example Two
  • Activity:  X-Rays
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5 0
4 years ago
Plz help thank you!!!
Furkat [3]

Answer:

1. Covalent Bond

2. Ionic Bond

Explanation:

Covalent bonds are defined as the bond in which sharing of electrons takes place between atoms. The sharing of electrons is in equal number so that it form a stable balance of attraction and repulsion between atoms. In the given example of CO2 (first image) oxygen is sharing equal number of electrons with carbon to form a stable bond called covalent bond.

Ionic bonds are formed when valence electrons are transferred to other atoms and form oppositely charged ions. In ionic bond formation, the atoms that gain electrons become negatively charged and the atoms that loses electrons become positively charged. In the given example of Ca Cl2, Ca is also giving its 2 valence electrons to each Cl and there is no stable balance of attraction and repulsion between atoms.

Hence, the correct answer is:

1. Covalent Bond

2. Ionic Bond

6 0
3 years ago
Write a paragraph explaining the effect of surface area on the rate of reaction.
nexus9112 [7]
(For a bit of context I will use the reaction between HCl and Mg as an example)

The larger the surface area of the magnesium metal, the more particles are exposed to collide with the aqueous HCl particles to cause the reaction to occur. This increases the frequency per second of collisions, speeding up the rate of reaction.

The effect of a catalyst is to reduce the minimum collision energy which allows the reaction to happen. This does not increase the number of collisions per second, but increases the percentage of successful collisions, which consequently causes the rate of reaction to increase .

I have drawn diagrams showing the effect of surface area, but there isn't really a meaningful diagram that I know of to show the impact of a catalyst (at least not at GCSE level).


6 0
3 years ago
When water vapor cools it condenses select the number that represents this process on the diagram
TiliK225 [7]
2 is the correct answer.
6 0
4 years ago
Read 2 more answers
A 1.25 g sample of aluminum is reacted with 3.28 g of copper (II) sulfate. What is the limiting reactant?
mestny [16]

Answer:

d. Copper (II) sulfate

Explanation:

Given data:

Mass of Al = 1.25 g

Mass of CuSO₄ = 3.28 g

What is limiting reactant = ?

Solution:

Chemical equation:

2Al + 3CuSO₄   →   Al₂ (SO₄)₃ + 3Cu

Number of moles of Al:

Number of moles = mass/molar mass

Number of moles = 1.25 g/ 27 g/mol

Number of moles = 0.05 mol

Number of moles of CuSO₄:

Number of moles = mass/molar mass

Number of moles = 3.28 g/ 159.6 g/mol

Number of moles = 0.02 mol

now we will compare the moles of reactant with product.

              Al           :           Al₂ (SO₄)₃

                2          :             1

              0.05       :          1/2×0.05=0.025 mol

               Al           :            Cu

                2            :              3

              0.05         :            3/2×0.05 = 0.075 mol

        CuSO₄           :           Al₂ (SO₄)₃

               3             :             1

              0.02         :          1/3×0.02=0.007 mol

        CuSO₄           :            Cu

              3               :              3

              0.02         :              0.02  

Less number of moles of reactants are produced by CuSO₄ thus it will act as limiting reactant.

7 0
3 years ago
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