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Sloan [31]
3 years ago
13

Complete and balance the equation for this reaction in acidic solution. zns+no3-

Chemistry
1 answer:
Viefleur [7K]3 years ago
8 0
The equation given in question is as follow,

                                  ZnS + NO₃⁻    →    Zn²⁺ + S + NO

Oxidation state of elements in reactant side are as follow,
                                      Zn  =  +2
                                      S    =  -2
                                      N    =  +5
                                      O   =  -2
Oxidation state of elements in product side are as follow,
                                      Zn  =  +2
                                      S    =  0
                                      N    =  +2
                                      O   =  -2
So, In this reaction Nitrogen is Reduced while Sulfur is Oxidized.

Now Split the reaction into two half cell reactions,

Reduction Reaction,
                                ZnS     →     S  +  2e⁻
Oxidation Reaction,
                               NO₃⁻  +  3e⁻   →     NO

As the oxygen atoms are not balance, So, in acidic medium add H⁺ on the side having greater number of Oxygen atom and H₂O on the side having less number of Oxygen atoms,
Hence,
                                 H⁺  +   NO₃⁻  + 3e⁻    →     NO  +  H₂O
Now Balance the reaction,

                                 4H⁺  +   NO₃⁻  + 3e⁻    →     NO  +  2H₂O

So, write both half cell equations as,
 
                                             ZnS     →     S  +  2e⁻   --------- (1)
                               4H⁺  +   NO₃⁻  + 3e⁻    →     NO  +  2H₂O  -------(2)

Multiply eq. 1 with 3 and eq. 2 with 2 to equalize the electron.
So,
                                         3ZnS     →     3S  +  6e⁻   

                       8H⁺  +   2NO₃⁻  + 6e⁻    →     2NO  +  4H₂O 
                     _____________________________________(e⁻ cancelled)

                            3ZnS + 2NO₃⁻ + 8H⁺   → 3Zn + 3S + 2NO + 4H₂O
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A 10.0 ml portion of 0.010 m hcl is diluted by adding it to100.0 ml of water. what is the ph of the solution
Volgvan

From the calculation, the pH of the solution after dilution is 3.

<h3>What is the pH?</h3>

The pH is the hydrogen ion concentration of the solution. Now we know that;

C1 =  0.010 m

V1 = 10.0 ml

V2 = 10.0 ml + 100.0 ml = 110 ml

C2 = ?

C1V1 = C2V2

C2 = C1V1 /V2

C2 =  0.010 m  * 10.0 ml / 110 ml

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199.5 grams unrefined dark crystalline sugar to cups
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0.9975 cup  

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 199.5 g brown sugar = 0.9975 cup

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2 years ago
Given that you have 14.5 moles of n2, how many moles of h2 are theoretically needed to produce 30.0 moles of nh3 according to re
erastovalidia [21]

45 moles of H₂ are theoretically needed to produce 30.0 moles of NH₃

<h3>Further explanation</h3>

Stoichiometry in Chemistry learn about chemicals mainly emphasizes quantitative, such as the calculation of volume, mass, number, which is related to numbers, molecules, elements, etc.

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

In the reaction there are also manifestations of reagent substances namely gas (g), liquid (liquid / l), solid (solid / s) and solution (aqueous / aq).

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

  • Mole

The mole itself is the number of particles contained in a substance amounting to 6.02.10²³

Mole can also be sought if the amount of substance mass and its molar mass is known

\large{\boxed{\boxed{\bold{mol=\frac{mass}{molar\:mass}}}}

 

Reaction that happens :

N₂ +3H₂ ⇒ 2NH₃

mole N₂ : H₂ : NH₃ = 1 : 3 : 2

To produce 30.0 moles of NH₃,

  • H₂ needed :

mole~H_2~=~\frac{3}{2}\times~30~mole

mole H₂ = 45 mole

  • N₂ needed :

mole~N_2~=~\frac{1}{2}~\times~30

mole N₂ = 15 mole

So the minimum N₂ needed is: 15 mole

14.5 moles of N₂ can only produce NH₃ :

mole~NH_3~=~\frac{2}{1}~\times~14.5

mole NH₃ = 29 mole

<h3>Learn more </h3>

The mass of one mole of raindrops

brainly.com/question/5233234

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brainly.com/question/4283309

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Keywords: mole,  NH₃, N₂, H₂

7 0
3 years ago
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