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Gekata [30.6K]
3 years ago
11

To calculate changes in concentration for a system not at equilibrium, the first step is to determine the direction the reaction

will proceed. To do so, we calculate Q and compare it to the equilibrium concentration, K. We can then determine that a reaction will shift to the right if:__________
Chemistry
1 answer:
Viefleur [7K]3 years ago
3 0

Answer:

We can then determine that a reaction will shift to the right if <u><em>Q<K</em></u>

Explanation:

Comparing Q with K allows to find out the status and evolution of the system:

  • If the reaction quotient is equal to the equilibrium constant, Qc = Kc, the system has reached chemical equilibrium.
  • If the reaction quotient is greater than the equilibrium constant, Qc> Kc, the system is not in equilibrium and will evolve spontaneously, decreasing the value of Qc until it equals the equilibrium constant. In this way, the concentrations of the products will decrease and the concentrations of the reagents will increase. In other words, the reverse reaction is favored to achieve equilibrium. Then the system will evolve to the left (ie products will be consumed and more reagents will be formed).
  • If the reaction quotient is less than the equilibrium constant, Qc <Kc, the system is not in equilibrium and will evolve spontaneously increasing the value of Qc until it equals the equilibrium constant. This implies that the concentrations of the products will increase and those of the reagents will decrease. In other words, to achieve balance, direct reaction is favored. Then the reaction will shift to the right, that is, reagents will be consumed and more products will be formed.

In this case, <u><em>we can then determine that a reaction will shift to the right if Q<K</em></u>

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How many grams of Co are needed to react with an excess of fe203 to produce 156.2 g FE? show your work.
Gekata [30.6K]

The reaction is given as

Fe2O3 (s)+ 3CO(g)--->3CO2(g)+ 2Fe(s)

No.of moles=mass in gram/molar mass

As for Fe mole =156.2g/55.847=2.7969~2.797

The ratio b/w CO and Fe is 3:2

Moles of CO needed= 2.797x3/2=4.1955

Mass of CO needed= 4.195mol x 28.01g/mol= 117.515g

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Because you can freeze the water you melted back into a ice cube.

Explanation:

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2 years ago
In one sample of a compound of copper and oxygen, 3.12g of the compound contains 2.50g of copper and the remainder is oxygen. Ca
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Answer:

% composition O = 19.9%

% composition Cu = 80.1%

Explanation:

Given data:

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Solution:

Formula:

<em>% composition = ( mass of element/ total mass)×100</em>

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% composition O = (0.62 g / 3.12 g)×100

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7 0
3 years ago
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