Table of Contents
Is Mercury a pure substance?
The element mercury is a pure substance. Nickel sulfate is also a pure substance but it is a compound of the elements nickel, sulfur, and oxygen.
Is Mercury an element compound homogeneous or heterogeneous?
| Description | Pure Substance or Mixture? | Classification? |
|---|---|---|
| 9. Kool-aid is added to water | Mixture | Homogeneous mixture (solution) |
| 10. Coca-cola | Mixture | Homogeneous mixture |
| 11. Helium gas (used to inflate a balloon) | Pure substance | Element |
| 12. Mercury metal (used in old thermometers) | Pure substance | Element |
Which one is the best way to determine whether an unknown sample is a substance or mixture?
Answer: C. observing its physical appearance.
Is mercury a mixture?
Pure mercury contains nothing else but mercury; it is an element, one of the chemical building blocks from which chemical compounds and mixtures are assembled. All the mercury atoms in it are the same, with atomic number 80. It also happens to be a metal, like gold or silver, whose purity can be measured.
How do you separate pure substances from oxygen?
Explanation: Substance 1 Oxygen cannot be separated. Substance 2 Water can be separated by the process of electrolysis.
Is mercury a mixture compound or element?
Mercury is a compound that can be found naturally in the environment. It can be found in metal form, as mercury salts or as organic mercury compounds.
How is mercury metal formed?
The metallic form is refined from mercuric sulphide ore by heating the ore to temperatures above 540º C. This vaporises the mercury in the ore, and the vapours are then captured and cooled to form the liquid metal mercury.
What kind of reaction does Mercury have with oxygen?
Mercury does not react with oxygen at ordinay temperatures. When heated it slowly oxidizes, forming mercury (II) oxide [13]: Metallic mercury does not react with alkalis under normal conditions. Upon heating, the precipitate turns red. Mercury metal reacts with F 2, Cl 2, Br 2, or I 2, to form the corresponding dihalides [13].
What happens when Mercury is mixed with water?
Mercury metal reacts with F 2, Cl 2, Br 2, or I 2, to form the corresponding dihalides [13]. Hg(I) is precipitated by Cl − ions, forming Hg 2Cl 2: Mercury(II) chloride is moderately soluble in water.
How does Mercury react with alkalis when heated?
When heated it slowly oxidizes, forming mercury (II) oxide [13]: Metallic mercury does not react with alkalis under normal conditions. Upon heating, the precipitate turns red. Mercury metal reacts with F 2, Cl 2, Br 2, or I 2, to form the corresponding dihalides [13].
What happens when Mercury is heated to 350 °C?
Mercury metal reacts in air at about 350 °C, forming mercury(II) oxide. Reaction of mercury with bases. Metallic mercury does not react with alkalis under normal conditions. Hg(I) as Hg22+ reacts with hydroxide, forming Hg2O.