It is prepared by roasting powdered chromite with potash and limestone, treating the cinder with a hot potassium sulfate solution and leaching.
Alternatively, it may be prepared by the reaction of potassium dichromate and potassium hydroxide.
You need 6,9 mL stock solution.
To make a solution you add a solute to a solvent.
1.3g
To make a 3.7% EDTA solution, you would add 3.7 grams of EDTA to 100 mL of solution.
No, you cannot make a 6% peroxide solution by diluting a 12% peroxide solution with water. To make a 6% peroxide solution, you would need to mix equal parts of the 12% peroxide solution with water.
K2Cr2O7 is potassium dichromate, while K2Cr2O4 is potassium chromate. K2Cr2O7 is an orange-red compound used as an oxidizing agent, while K2Cr2O4 is a yellow compound. K2Cr2O7 tends to be more powerful as an oxidizing agent compared to K2Cr2O4.
The oxidation number of Cr in K2Cr2O4 is +6. This is because each oxygen atom contributes an oxidation number of -2, and each potassium atom contributes an oxidation number of +1, resulting in a total charge of 0 for the compound.
Add water to the solution
No, evaporation will most likely make the solution supersaturated
It is the solution; sometimes also called the root.
Solute dissolves in solvent to form solution.
You have to Heat it!
concentrated solution
You need 6,9 mL stock solution.
A solute dissolves in a solvent to make a solution
Dissolving a solute in a solvent a solution is obtained.
To make an electrolyte solution you dissolve a teaspoon of salt in a glass of water.