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. The solute dissolves in the solvent, resulting in a homogeneous mixture where the solute particles are evenly distributed throughout the 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.
A concentrated solution can be weakened by adding more of the solution material (usually water) to dilute it.
concentrated solution
You have to Heat it!
Solute dissolves in solvent to form 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.