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Viefleur [7K]
3 years ago
9

A group of scientists followed a set of steps designed to detect metals found in different sources of drinking water. The steps

are shown out of order. Arrange the steps so that they correctly describe the investigation as the scientists should have performed it.
Conclude which, if any, of the
water samples have unsafe
levels of metal.

Measure the amounts of metals
in each sample and record the
amounts in a table.

Predict whether or not water
sources near a manufacturing
plant are contaminated.

Collect the water samples.
Chemistry
1 answer:
Allushta [10]3 years ago
5 0

Answer:

1.Predict whether or not water

sources near a manufacturing

plant are contaminated

2.Collect the water samples

3.Measure the amounts of metals

in each sample and record the

amounts in a table.

4.Conclude which, if any, of the

water samples have unsafe

levels of metal.

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B. A battery.

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Complete the dissociation reaction and the corresponding Ka equilibrium expression for each of the following acids in water. (Ty
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Answer :

(A) The dissociation reaction of HC_2H_3O_2 will be:

HC_2H_3O_2(aq)\rightleftharpoons H^+(aq)+C_2H_3O_2^-(aq)

The equilibrium expression :

K_a=\frac{[H^+][C_2H_3O_2^-]}{[HC_2H_3O_2]}

(B) The dissociation reaction of Co(H_2O)_6^{3+} will be:

Co(H_2O)_6^{3+}(aq)\rightleftharpoons H^+(aq)+Co(H_2O)_5(OH)^{2+}(aq)

The equilibrium expression :

K_a=\frac{[H^+][Co(H_2O)_5(OH)^{2+}]}{[Co(H_2O)_6^{3+}]}

(C) The dissociation reaction of CH_3NH_3^+ will be:

CH_3NH_3^+(aq)\rightleftharpoons H^+(aq)+CH_3NH_2(aq)

The equilibrium expression :

K_a=\frac{[H^+][CH_3NH_2]}{[CH_3NH_3^+]}

Explanation :

Equilibrium constant : It is defined as the equilibrium constant. It is defined as the ratio of concentration of products to the concentration of reactants.

The equilibrium expression for the reaction is determined by multiplying the concentrations of products and divided by the concentrations of the reactants and each concentration is raised to the power that is equal to the coefficient in the balanced reaction.

As we know that the concentrations of pure solids and liquids are constant that is they do not change. Thus, they are not included in the equilibrium expression.

(A) The dissociation reaction of HC_2H_3O_2 will be:

HC_2H_3O_2(aq)\rightleftharpoons H^+(aq)+C_2H_3O_2^-(aq)

The equilibrium expression of HC_2H_3O_2 will be:

K_a=\frac{[H^+][C_2H_3O_2^-]}{[HC_2H_3O_2]}

(B) The dissociation reaction of Co(H_2O)_6^{3+} will be:

Co(H_2O)_6^{3+}(aq)\rightleftharpoons H^+(aq)+Co(H_2O)_5(OH)^{2+}(aq)

The equilibrium expression of Co(H_2O)_6^{3+} will be:

K_a=\frac{[H^+][Co(H_2O)_5(OH)^{2+}]}{[Co(H_2O)_6^{3+}]}

(C) The dissociation reaction of CH_3NH_3^+ will be:

CH_3NH_3^+(aq)\rightleftharpoons H^+(aq)+CH_3NH_2(aq)

The equilibrium expression of CH_3NH_3^+ will be:

K_a=\frac{[H^+][CH_3NH_2]}{[CH_3NH_3^+]}

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<u>Answer:</u> The net ionic equation is written below.

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Net ionic equation of any reaction does not include any spectator ions.

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Ionic form of the above equation follows:

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As, chlorate ions are present on both the sides of the reaction, thus, it will not be present in the net ionic equation.

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NH_4^+(aq.)+H_2O(l)\rightarrow NH_3^+(aq.)+H_3O^+(aq.)

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