Homework Answers
Potassium chlorate when added to boiling water it decomposes into potassium chloride and oxygen gas.
As per balanced equation when 2 moles of potassium chlorate is heated it gives 2 moles of potassium chloride and 1 mole of oxygen gas.
When 0.8 moles of potassium chlorate is added to boiling water it decomposes into 0.8 moles of potassium chloride and 0.4 moles of oxygen gas.
In boiling water potassium chloride will be present in dissolved state and when the solution is cooled to 20oC it precipitates.
So, the number of moles of potassium chlorate that precipitates from solution = 0.8 moles
Molar mass of potassium chlorate (KCl) = 39 + 35.5 = 78.5
The mass of potassium chlorate precipitated = 0.8 x 78.5 = 62.8 g
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work)
A chemist prepares a solution of barium chlorate (Ba(CIOby measuring out 12.1 umol of barium chlorate into a 350. ml. volumetric flask and filling the flask to the mark with water Calculate the concentration in mmol/L of the chemist's barium chlorate solution. Round your answer to 3 significant digits. mmol
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n a pink aqueous solution of potassium permanganate, faintly addified with dilute sulfuric acid was treated the reaction took place with the evolution of gas bubbles, and the pink solution turned colorless. Further chemical analysis revealed that the evolved gas was oxygen, and the resulting solution contains potassium sulfate and manganese () sulfate; water was also formed during the same reaction. Please with 10% aq. hydrogen peroxide, answer the followings: 1) Write down the balanced chemical equation for this reaction....
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