0
Add your answer:
Earn +20 pts
What is the chemical make up of hexavalent chromium?
It is a valence of chromium. The hexavalent chromium is present in anions as CrO42- and Cr2O72-.
What is Cr charge in formula CaCr2O7?
In the formula CaCr2O7, the Cr represents chromium, specifically in its +6 oxidation state. This compound is calcium dichromate, often used as an oxidizing agent in organic chemistry reactions.
What is valency of dichromate?
Its valency is -2 Its chemical formula is Cr2O7
How do you get prussian blue precipitate?
To get Prussian blue precipitate, you can mix solutions of potassium ferrocyanide and iron(III) chloride. The reaction between these two solutions will form insoluble Prussian blue precipitate. It appears as a dark blue solid suspended in the solution.
Oxidation state of chromium in dichromate ions?
The oxidation state of chromium in dichromate ions (Cr2O7 2-) is +6. Each oxygen atom carries an oxidation state of -2, so with seven oxygen atoms in the ion, the total charge must be -2, which means each chromium atom carries an oxidation state of +6 to balance the charge.
What is Valency of potassium dicromate?
The valency of potassium dichromate is +6. This is because potassium has a valency of +1, and each chromium atom in the dichromate ion has a valency of +6.
What is the oxidation number of chromium in potassium dichromate?
The oxidation number of chromium in potassium dichromate is +6. Each oxygen has an oxidation number of -2, and since the compound is neutral, the oxidation number of potassium is +1. This means the two chromium atoms in potassium dichromate each have an oxidation number of +6 to balance the charges.
What is the oxidation number of Cr is acidified potassium dichromate?
The oxidation number of Cr in acidified potassium dichromate (K2Cr2O7) is +6. This is because each oxygen atom has an oxidation number of -2, and the overall charge of the dichromate ion is -2.
Is Potassium nitrate a solid?
Corrected answer:NO,MOST of the potassium salts and ALL of the nitrates are SOLUBLE, not insoluble!!!So potassium nitrate is NOT INsolubleSome potassium salts and complexes are insoluble like Potassium Hexanitritocobaltate(III) = K3[Co(NO2)6] , etc.
Please Help me in finding the valency of dichromate in ammonium dichromate?
The valency of dichromate ion (Cr₂O₇) in ammonium dichromate (NH₄)₂Cr₂O₇ is 6. This is because the two chromium atoms each have a valency of 6 in the dichromate ion, which is balanced by the two ammonium ions with a valency of 1 each.
What is gram equivalent weight of potassium dichromate?
The gram equivalent weight of potassium dichromate (K2Cr2O7) is calculated as the molar mass divided by the change in oxidation state per mole of electrons involved in the reaction. For potassium dichromate, since the change in oxidation state is 6 (from Cr6+ to Cr3+), the gram equivalent weight is molar mass of K2Cr2O7 divided by 6.
Which one is better for titration with Ferrous Ammonium Sulphate potassium dichromate or potassium permaganate and why?
Potassium dichromate is better for titration with ferrous ammonium sulfate because it reacts with ferrous ions in a 1:6 ratio, making it easier to determine the equivalence point accurately. Potassium permanganate, on the other hand, reacts with ferrous ions in a 1:5 ratio, which can lead to less precise results and requires a more careful technique.
Is KNO3 soluble or insoluble?
no (yes! - lordwelsh) 13.3 g/100 mL (0 °C) 36 g/100 mL (25 °C) 247 g/100 mL (100 °C) --------------------------------------------------------------------------- Here are some solubility rules in case you need to know other compounds' solubility: 1. All alkali metal (lithium,sodium,potassium,rubidium, and cesium) and ammonium compounds are soluble. 2. All acetate, perchlorate, chlorate, and nitrate compounds are soluble. 3. Silver, lead, and mercury(I) compounds are insoluble. 4. Chlorides, bromides, and iodides are soluble. 5. Carbonates, hydroxides, oxides, phosphates, silicates, and sulfides are insoluble. 6. Sulfates are soluble except for calcium and barium. The first rule states it is soluble because it has potassium. But in other cases two rules will say different things. Like on will say soluble and one will say insoluble so always follow the first one listed. A more specific example is AgCl. Rule 3 overtakes rule 4 so it is insoluble.
What is the oxidation number of one chromium atom in potassium dichromate?
The oxidation number of one chromium atom in potassium dichromate (K2Cr2O7) is +6. This is because each oxygen atom has an oxidation number of -2 and each potassium atom has an oxidation number of +1, so the overall charge of the compound is zero, making the oxidation number of chromium +6 to balance it out.
Chemical reaction between iron and potassium dichromate?
When iron reacts with potassium dichromate, iron(II) ion is oxidized to iron(III) ion by dichromate, which gets reduced to chromium(III) ion. The balanced chemical equation for this reaction is: 6 Fe^2+ + 14 H^+ + Cr2O7^2- --> 6 Fe^3+ + 2 Cr^3+ + 7 H2O
What chemical compound is Ag2CO3?
No Ag2CO3 is not soluble Here are some solubility rules: 1. All alkali metal (lithium,sodium,potassium,rubidium, and cesium) and ammonium compounds are soluble. 2. All acetate, perchlorate, chlorate, and nitrate compounds are soluble. 3. Most of silver, lead, and mercury(I) compounds are insoluble. 4. Chlorides, bromides, and iodides are soluble except those at 3. 5. Carbonates, hydroxides, oxides, phosphates, silicates, and sulfides are insoluble except those at 1. 6. Sulfates are soluble except for calcium and barium and those at 3. Rule 3 says silver is insoluble. For a different compound it might have a disagreement with rules one saying its soluble one saying insoluble. Always go with the first one listed in these rules. A more specific example is AgCl. Rule 3 overtakes rule 4 so it is insoluble. ~Higgins~
How many grams of oxygen is in 2 moles of potassium dichromate?
There are 6 moles of oxygen atoms in 2 moles of potassium dichromate (K2Cr2O7). Each mole of K2Cr2O7 contains 7 oxygen atoms, so 2 moles would contain 14 oxygen atoms. The molar mass of oxygen is 16 g/mol, so there would be 224 grams of oxygen in 2 moles of K2Cr2O7.
