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Answered 2014-08-26 16:17:05

In one mole of potassium dichromate, there seven moles of oxygen. This means in two moles of K2Cr2O7, there are 14 moles of O, or 7 Moles of O2, which equals 224 grams.

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How many moles of oxygen will be in 2 moles of potassium dichromate?

The chemical formula for potassium dichromate is K2Cr2O7. In one formula unit of K2Cr2O7 there are 7 oxygen atoms. Thus in 2 mol of K2Cr2O7 there would be 7(2)=14mol of oxygen atoms.


What elements make up K2Cr2O7?

Potassium dichromate contain potassium, chromium and oxygen.


He formula for potassium dichromate is Kร‹รƒCrร‹รƒOร‹รˆ How many grams of oxygen will be in 2 moles of potassium dichromate?

The formula for potassium dichromate is KËÃCrËÃOËÈ. How many grams of oxygen will be in 2 moles of potassium dichromate?



What is the oxidation number of chromium in potassium dichromate?

potassium dichromate is K2Cr2O7. The oxidation number of Cr is -6. (Oxygen is -2, K is +1 so Cr must be -6)


How many grams of oxygen will in 2 moles of potassium dichromate?

Structure for this is K2Cr2O7. there are 14 moles of O in 2 moles.


How many grams of oxygen will be in 2 moles of potassium dichromate?

224 grams of Oxygen will be in 2 moles of Potassium dichromate.


What do subscripts tell you about a compound?

The subscripts following an element tells you the number of atoms of that element in one molecule of the compound. Example: potassium dichromate has the formula K2Cr2O7. There are 2 potassium atoms (K), 2 chromium atoms (Cr) and 7 oxygen atoms (O), in one molecule of the compound.


How many grams of oxygen wil be in two moles of potassium dichromate?

224 g are in two moles of potassium dichromate.


What is principle of potassium dichromate in COD estimation?

The titer volume of the sample gives the volume of Ferrous Ammonium Sulphate required to react with the excess potassium dichromate in the solution. Similarly, the titer volume for the blank (distilled water) gives the volume of Ferrous Ammonium Sulphate required to react with the excess potassium dichromate in the blank. The equation for the titration can be expressed as: Cr2O72 -- + FeSO4 (NH4)2SO4 = Cr+ + NH4+ + Fe 3+ From above equation it can be seen that one molecule of dichromate corresponds to one molecule of Mohr's salt. Thus, the difference in volume of excess K2Cr2O7 reacting with Mohr's solution can be calculated from the expression: = (Original vol. K2Cr2O7 -- vol. of K2Cr2O7 used for oxidation) solution - (Original vol. K2Cr2O7 -- vol. of K2Cr2O7 used for oxidation) blank = (Vol. of K2Cr2O7 used for oxidation) blank - Vol. of K2Cr2O7 used for oxidation) solution Hence, the difference in the titer volume for the solution and the blank is used to find out the Chemical Oxygen Demand directly.


What percent of potaasium dihromate K2Cr2O7 oxygen?

The percentage of potassium is 26,53 %.



Example of element and compound mixture?

Element: oxygen, potassium Compound: sodium chloride, potassium dichromate Mixture: air, orange juice


The chemical formula for an ionic compound of potassium and oxygen is what?

the chemical formula for potassium and Oxygen is: K2O Because Potassium has a charge of 1+. And Oxygen has a charge of 2- Hope this helps!


Compound made of carbon hydrogen and oxygen?

== Carbon, hydrogen and oxygen are the basic building blocks of many organic compounds. They are commonly known as carbohydrates (carbon, hydrogen and oxate [from oxygen compounds, such as chlorate (ClO3-) or potassium dichromate (K2Cr2O7)] In organic chemistry, homologous series which are carbohydrates consist of, but are not limited to: * Aldehydes * Ketones * Carboxylic acids * Alcohols


What chemicals are oxidant?

Examples: potassium permanganate, potassium dichromate, oxygen, ozone, nitric acid, sodium hypochlorite, hydrogen peroxide, fluorine, chlorine, potassium perchlorate etc.



Silver dichromate formula?

Silver dichromate has the molecular formula of Ag2Cr2O7. Ag corresponds to silver, Cr to chromium, and O is oxygen. The atomic mass of silver dichromate is 431.8 grams per mole (using 4 significant digits).


What is the chemical formula for oxygen and potassium chloride?

O2 is oxygen molecule; KCl is potassium chloride


What are the elements in potassium sorbate?

The chemical formula of potassium sorbate is C6H7O2K; potassium sorbate contain carbon, hudrogen oxygen and potassium.


What elements are in potassium sorbate?

The chemical formula of potassium sorbate is C6H7O2K; potassium sorbate contains carbon, hydrogen, oxygen and potassium.


What is obtained by oxidising 2-hexanone?

Ketones resist oxidation by most oxidising agents, including potassium dichromate and molecular oxygen.


How many oxygen atoms does dichromate have?

Dichromate is Cr2O7^2- so it has 7 oxygen atoms in one molecule


What is the oxidation number of Metal in K2Cr2O7 formula?

Potassium is the metal here and it has an Oxidation number of +1 in every compound because all Alkali Earth metals have an Oxidation Number of +1. (The other elements: Oxygen -2 and Chromium (Cr) +6)


What is the correct formula for Potassium and Oxygen gas react to form potassium oxide?

potassium reacts with oxygen to form a superoxide K + O2--------> KO2 The oxygen in this form has an oxidation state of 0.5


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