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3 years ago

What process is used to separate gold atoms from crushed rock?

1 answer:

6 0

<span>Mercury is most often used. Elemental mercury is combines with the crushed and powdered rock to form a slurry and create a gold amalgam. This amalgam needs to be separated from the mercury and crushed rocks through a fine seize or chamois leather, letting the mercury come through but the amalgam to stay behind. The amalgam is now heated, letting the mercury to sublime from the amalgam leaving behind elemental gold in the mixture.</span>

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Is the solution containing 0.20 M Pb2 and 0.10 M Cl (Ksp 1.6x105) a) saturated, b) unsaturated, c) at equilibrium, d) none of th

raketka [301]

Answer : The correct option is, (b) unsaturated

Explanation :

Ionic product : It is defined as the product of the concentrations of the ions present in solution raised to the same power by its stoichiometric coefficient in a solution of a salt. This takes place at any concentration. The ionic product is represented as, Q.

Solubility product constant : It is defined as the product of the concentration of the ions present in a solution raised to the power by its stoichiometric coefficient in a solution of a salt. This takes place at equilibrium only. The solubility product constant is represented as, $K__{sp}$ .

Now we have to calculate the ionic product of given solution.

The balanced chemical reaction is,

$PbCl_2(aq)\rightarrow Pb^{2+}(aq)+2Cl^-(aq)$

The expression of ionic product will be,

$Q=[Pb^{2+}][Cl^-]^2$

$Q=(0.20)\times (0.10)^2$

$Q=0.002$

The ionic product of solution is, 0.002

There are three cases for the solubility :

When $Q$ this means that the solution is unsaturated solution and more solid will be dissolve.

When $Q=k_{sp}$ this means that the solution is saturated solution.

When $Q>k_{sp}$ this means that the solution is supersaturated solution and solid will be precipitate.

From this we conclude that the value of $k_{sp}=1.6\times 10^5$ is greater than the ionic product that means the solution is unsaturated solution and more solid will be dissolve.

Hence, the correct option is, (b) unsaturated

6 0

3 years ago

Explain the importance of concentration as it pertains to a solution

julia-pushkina [17]

There it is, I hope it gets to be helpful

5 0

3 years ago

How old were you when u got your first kiss? if you still haven't gotten it how old are you now?

goldfiish [28.3K]

Answer:

I havent kiss anyone

Explanation:

cuz most men are butts

7 0

2 years ago

Read 2 more answers

Which statement illustrates the difference between a chemical reaction and a nuclear reaction?A nuclear reaction releases more e

denpristay [2]

According to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

<h3>What is a nuclear reaction?</h3>

It is a procedure that leads to combining and modifying the nuclei of atoms and subatomic particles and appears to violate the law of conservation of mass.

Through this kind of process, the nuclei can be combined or fragmented, absorbing or releasing particles and energy according to each case.

Therefore, we can conclude that according to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

Learn more about nuclear reactions here: brainly.com/question/1480032

#SPJ1

4 0

2 years ago

What does your immune system do? a. makes you sick b. keep your brain sharp c. protect you from illness d. make energy for your

Dima020 [189]

Answer:

C.KEEPS YOU FROM ILLNESS

Explanation:

THE WORD IMMUNE MEANS TO PROTECT THUS THE IMMUNE SYSTEM IS TO PROTECT YOUR BODY AGAINST PATHOGENS AND DEASISES CAUSING GERMS....

6 0

3 years ago

Read 2 more answers