What happens when you add hydrochloric acid to cobalt chloride?
If you add concentrated hydrochloric acid to a solution containing hexaaquacobalt(II) ions (for example, cobalt(II) chloride solution), the solution turns from its original pink colour to a dark rich blue. The six water molecules are replaced by four chloride ions. The reaction taking place is reversible.
What is formed when HCl is added to CoCl2?
HCl Cobalt Chloride. In this experiment we will study the effect of adding HCl to cobalt(II) chloride in water. The addition of HCl forms a blue chloride complex.
Why does cobalt chloride turn blue when HCl is added?
If the chloride or cobalt concentrations increase, the equilibrium will also shift towards the blue anhydrous cobalt chloride. For example, when hydrochloric acid is added, the added chloride ions shift the equilibrium position in favour of blue [CoCl4]2- ions and water.
What is cobalt II chloride hexahydrate used for?
Cobalt (II) chloride hexahydrate is a metal used with other metals to make metal alloys. Because cobalt and nickel can be found in many of the same metal products, allergies to both metals can develop.
How does cobalt react with acid?
Cobalt has the ability to react with most acids to produce hydrogen gas. The simplest ion that cobalt forms in solution is the pink hexaaquacobalt(II) ion – [Co(H2O)6]2+. Cobalt(II) chloride is often used in humidity indicators because in dry form it is blue and when hydrated it is pink.
Does cobalt react with HCl?
Cobalt gives cobalt(II) chloride by dissolving in dilute hydrochloric acid . It is insoluble because it acquires passivity in concentrated nitrate and sulphuric acid .
Does cobalt react with HCL?
How do you make cobalt chloride blue?
If heat is added, the equilibrium will shift towards the cobalt chloride complex, which is blue in color. Cooling will shift the products towards the hydrated complex, which is more pink. If the chloride or cobalt concentrations increase, the equilibrium will also shift towards the blue anhydrous cobalt chloride.
What is the pharmaceutical use of cobalt II chloride?
Cobalt chloride is one method used to induce pulmonary arterial hypertension in animals for research and evaluation of treatment efficacy.
What is cobalt II chloride hexahydrate found in?
Cobalt (II) chloride hexahydrate is a metal used with other metals to make metal alloys. This substance can be found in spray paints, enamels, wood stains and paints, as well as bricks and cement and metal tools. It is also commonly fond in keys, jewelry and orthopedic and dental implants.
Does co react with HCl?
The modeling results led to the conclusion that the presence of HCl (100–600 ppmv) has a strong effect on the CO oxidation at low temperatures of approximately 1023 K. Thus, when HCl is present, more OH will be available for CO oxidation and also more H radicals are formed via the CO burnout reaction.
What to know about cobalt (II) chloride?
Cobalt (II) chloride Properties. Cobalt (II) chloride is normally found in the red (or pink) form. The red form has water in it. Preparation. The anhydrous (without water) blue form can be made by reacting cobalt with chlorine. Uses. It is used to place cobalt into other chemical compounds. Safety. It is a weak oxidizing agent, too weak to ignite things.
What is the formula for cobalt(II) chloride?
Cobalt(II) chloride is an inorganic compound of cobalt and chlorine, with the formula CoCl 2. It is a sky blue crystalline solid. The compound forms several hydrates CoCl 2 • nH 2O, for n = 1, 2, 6, and 9. Claims of the formation of tri- and tetrahydrates have not been confirmed.
What is the formula for cobalt II chlorite?
Cobalt(II) chlorate is a chemical compound with the formula Co(ClO 3) 2. It is formed by a double displacement reaction between cobalt(II) sulfate and barium chlorate , barium sulfate precipitates and cobalt chlorate can be crystallized out of the filtrate.
What is the formula for cobalt (II) chlorate dihydrate?
Formula and structure: The cobalt (II) chloride chemical formula is CoCl 2. This molecule present different level of hydratation: anhydrous (CoCl 2 ), dihydrate (CoCl 2 .2H 2 O) and hexahydrate (CoCl 2 .6H 2 O) which have molar mass of 129.839 g mol -1, 165.87 g mol -1 and 297.93 g mol -1.