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olya-2409 [2.1K]
3 years ago
15

Identify the missing coefficient in the balanced equation and classify the type of reaction.

Chemistry
2 answers:
Lostsunrise [7]3 years ago
5 0

Answer:

Option 6 ) Neutralization

Explanation:

For this case, the missing coefficient would be a "6" before the H₂O, within final products (right side of the equiation), hence, the final reaction should be:

2H₃PO₄ + 3Ba(OH)₂ ------> Ba₃(PO₄)₂ + 6H₂O

You should have in mind that the amount of atoms at each side of the chemical equation should be the same, so as to comply with the principle of mass conservation. If you add "6" on the left side of the H₂O, the equation will be balanced (for each side, lef and right, you will have: 12H, 2P, 14O and 3Ba)

Lastly, this is a chemical neutralization reaction, where an acid (H₃PO₄) is reacting with a base (Ba(OH)₂) in order to finally obtain a neutral salt (Ba₃(PO₄)₂) and water (H₂O)

solong [7]3 years ago
4 0

<u>Answer:</u>

<em>6; Neutralization</em>

<em></em>

<u>Explanation:</u>

2H_3 PO_4+3Ba(OH)_2>Ba_3 (PO_4)_2+H_2 O

(Unbalanced)

Balancing is making the number of atoms of each element same on both the sides  (reactant and product side).

To find the number of atoms of each element we multiply coefficient and the subscript  

For example 5Ca_1Cl_2 contains  

5 × 1 = 5 ,Ca atoms and

5 × 2 = 10, Cl atoms  

If there is a bracket in the chemical formula  

For example 3Ca_3 (P_1 O_4 )_2 we multiply coefficient × subscript × number outside the bracket to find the number of atoms  

(Please note: 3 is the coefficient, and if there is no number given then 1 will be the coefficient )

So

3 × 3 = 9 , Ca atoms  

3 × 1 × 2 = 6, P atoms  

3 × 4 × 2 = 24, O atoms are present

<u>Reactant side</u>           <u>Number of atoms or groups </u>                   <u>Product side </u>

                                       <u>of each element  </u>  

3                                                 Ba                                                           3

2                                                 PO_4                                      2

12                                                H                                                             2

6                                                 O (Exclude O of PO_4)         1

To balance H and O, multiply H_2O by 6 so we have

2H_3 PO_4+3Ba(OH)_2>Ba_3 (PO_4)_2+6 H_2 O

<u>Reactant side  </u>      <u>   Number of atoms or groups</u>                    <u>Product side </u>

                                       <u>of each element </u>  

3                                                 Ba                                                           3

2                                                 PO_4                                      2

12                                                H                                                            12

6                                                 O (Exclude O of PO_4)        6

Balanced!!!!

Acid and base reacts to form salt and water is called a neutralization reaction.

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Answer:

The answer to your question is:

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Explanation:

2.-

Data

CH2O

molar mass = 360.3 g/mol

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                          x = 12

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Then, we need to convert the mass given to moles of each compound.

After that, we need used rule of three calculate the amount of products based on the moles of reactants given.

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35 g of Mg reacted with excess O2

percent yield = 90%

Actual yield = ?

Formula

Percent yield = (actual yield/theoretical yield) x 100

Equation  

                       2Mg  + O2 ⇒ 2MgO

                      48.62 g of Mg ----------------- 80.62 g of MgO

                      35g                  ------------------  x

                     x = 58 g of MgO     (Theoretical yield)

Theoretical yield = 58 g of MgO

Actual yield = percent yield x theoretical yield / 100

                    = 90 x 58 / 100

                   = 52. 23 g

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