Chemistry, 24.07.2019 01:00 Hunter1471

Describe how to use le chatelier's principle to predict the possible ways a chemical system can respond to changes.

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According to Le Chatelier's Principle," when a system at equilibrium is subjected to any external stress by changing concentration, pressure or temperature, it will modify itself in such a way so as to minimize the effect of that change made in it".

Change in Concentration:
Suppose following reaction at equilibrium,

A + B   ⇆ C

When the concentration of reactants (A or B) is increased the equilibrium will shift in forward direction and will produce more product in order to cancel out the effect of extra reactant added. Or, if product (C) is added then it will respond in opposite direction.

Change in Pressure:
Suppose following reaction at equilibrium,

A + B   ⇆ C

If pressure is applied on this equilibrium, the equilibrium will shift in forward direction because there is a decrease in volume at product side (1 mole as compare to reactants which are 2 moles). And the opposite case will be observed if the pressure is decreases.

Change in Temperature:
Suppose following reaction at equilibrium,

A + B   ⇆ C + Heat

This is an exothermic reaction (heat is evolved) and the heat produced is in the product side. When the temperature is increased the equilibrium will shift in the backward direction. And decrease in temperature will shift the equilibrium in forward direction.

Answer from: Quest

since electrons are negative the answer is neagtaive

Answer from: Quest

Answer : option a) 84explanation :

considering the question as per the attachment

$^{222}_{86}> ^{218}_{84}po+^{4}_{2}he$

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.

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Describe how to use le chatelier's principle to predict the possible ways a chemical system can resp...

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