Table of Contents
- 1 Why is cobalt reactive?
- 2 What substances does cobalt react with?
- 3 What happens when you add water to cobalt?
- 4 Which country has the most cobalt?
- 5 Why is cobalt pink?
- 6 What happens when you mix CoCl2 and HCl?
- 7 Is cobalt atomic or molecular?
- 8 What is the formula for cobalt II ion?
- 9 What charge does cobalt have?
Why is cobalt reactive?
Chemical Properties Cobalt is somewhat of a reactive element. It combines with oxygen in the air, but does not catch on fire and burn unless it is in powder form. Cobalt has the ability to react with most acids to produce hydrogen gas.
What substances does cobalt react with?
Cobalt is one of the three metals that are ferromagnetic at room temperature. It dissolves slowly in dilute mineral acids, does not combine directly with either hydrogen or nitrogen, but will combine, on heating, with carbon, phosphorus, or sulfur.
What happens when you add water to cobalt?
If the chloride or cobalt concentrations increase, the equilibrium will also shift towards the blue anhydrous cobalt chloride. Add water, however, and the equilibrium will shift back towards the pink hydrated species.
Does cobalt react with HCL?
Cobalt gives cobalt(II) chloride by dissolving in dilute hydrochloric acid [4]. It is insoluble because it acquires passivity in concentrated nitrate and sulphuric acid [6].
What is the main use of cobalt?
Cobalt is also used to make airbags in automobiles; catalysts for the petroleum and chemical industries; cemented carbides (also called hardmetals) and diamond tools; corrosion- and wear-resistant alloys; drying agents for paints, varnishes, and inks; dyes and pigments; ground coats for porcelain enamels; high-speed …
Which country has the most cobalt?
Democratic Republic of Congo
1. Democratic Republic of Congo – 3.6 million tonnes. The DRC is home to more than 50% of the world’s cobalt reserves, with an estimated 3.6 million tonnes available for extraction in the country.
Why is cobalt pink?
The cobalt chloride changes color because the salt in the solution dissociates into ions. Cobalt ions are hydrated in the solution and have a pink color. This is because the chlorine ions force the water out of the water complex of cobalt.
What happens when you mix CoCl2 and HCl?
HCl Cobalt Chloride. In this experiment we will study the effect of adding HCl to cobalt(II) chloride in water. Dissolving cobalt(II) chloride in water makes the pink hydrage. The addition of HCl forms a blue chloride complex.
Does cacl2 react with HCl?
Calcium Chloride does not “react” with HCl. Calcium chloride is a water soluble ionic salt formed from one Ca+2 cation, and two Cl-1 anions.
Is cobalt reactive or nonreactive?
Cobalt is a moderately reactive element. It combines slowly with oxygen in the air, but does not catch fire and burn unless it is in a powder form. It reacts with most acids to produce hydrogen gas. It does not react with water at room temperatures.
Is cobalt atomic or molecular?
Cobalt (chemical symbol Co) is a chemical element. It has an atomic number of 27 and an atomic mass of about 59.
What is the formula for cobalt II ion?
The symbol for the cobalt (II) ion is Co2+. The symbol for the hydrogen carbonate ion is HCO- 3 (you have memorized the formulas of the polyatomic ions, haven’t you?). So, the formula contains Co2+,HCO- 3. We need two “-” charges to balance the “2+” charges on the Co.
What charge does cobalt have?
Cobalt is a transition metal, so it forms a cation with a positive charge. The bromide ion has a 1- charge, so if two are needed to balance the charge of the cobalt, then cobalt must have a 2+ charge.