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4 years ago

Need Chemistry help ASAP! Which of the following statements regarding chemical equilibrium is NOT necessarily true?

2 answers:

6 0

C is necessarily not true because at equilibrium, only the rates of the forward and reverse reaction are the same. Concentrations and amounts of both reactants and products do not have to be the same at equilibrium

guajiro [1.7K]4 years ago

3 0

So confusing try to explain more plz

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What are the useful of carbonate

Shalnov [3]

Answer:

Carbonates are widely used in industry, such as in iron smelting, as a raw material for Portland cement and lime manufacture, in the composition of ceramic glazes, and more.

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3 years ago

The solubility of lead(II) iodide is 0.064 g/100 mL at 20ºC. What is the solubility product for lead(II) iodide?

quester [9]

Answer:

$Ksp=1.07x10^{-8}$

Explanation:

Hello,

In this case, the dissociation reaction is:

$PbI_2(s)\rightleftharpoons Pb^{2+}(aq)+2I^-(aq)$

For which the equilibrium expression is:

$Ksp=[Pb^{2+}][I^-]^2$

Thus, since the saturated solution is 0.064g/100 mL at 20 °C we need to compute the molar solubility by using its molar mass (461.2 g/mol)

$Molar solubility=\frac{0.064g}{100mL}*\frac{1000mL}{1L}*\frac{1mol}{461.2g}=1.39x10^{-3}M$

In such a way, since the mole ratio between lead (II) iodide to lead (II) and iodide ions is 1:1 and 1:2 respectively, the concentration of each ion turns out:

$[Pb^{2+}]=1.39x10^{-3}M$

$[I^-]=1.39x10^{-3}M*2=2.78x10^{-3}M$

Thereby, the solubility product results:

$Ksp=(1.39x10^{-3}M)(2.78x10^{-3}M)^2\\\\Ksp=1.07x10^{-8}$

Regards.

6 0

4 years ago

Explain how mass is conserved when a candle burns.

blondinia [14]

When the candle is lit and burn to liquid wax, it still has its originally mass, but in liquid form

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3 years ago

A mutation occurs that prevents a cell from taking in the glucose that it needs for energy production. What is most likely to ha

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3 years ago

How can the rate of a reaction be increased?

Nana76 [90]

I think it may be A.
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3 years ago

Read 2 more answers