Bound Flask
Posted in Leather Crafts on 01/06/2010 11:03 am by adminBound Flask
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US $19.99
A hydrate is a chemical compound that has water molecules bound loosely to it by electrostatic forces. When th?
A hydrate is a chemical compound that has water molecules bound loosely to it by electrostatic forces. When the hydrated compound is heated, the water molecules are released as water vapor. The formula of the copper carbonate hydrate, Cu₂CO₃(OH)₂*H₂O, tells us that one water molecule is bound to each copper carbonate hydroxide molecule.
From the ratio of the mass of the black product to the initial 5g placed in the flask, could the remaining black compound be the anhydrous copper carbonate hydroxide molecule Cu₂CO₃(OH)₂? The molecular weight of Cu₂CO₃(OH)₂ is 221.116 g/mol, while that of water is 18.015 g/mol. Show your calculations.
Where the mass is 96.780g before heating and 95.107g after heating. The content is a black powder
A hydrate is a chemical compound that has water molecules bound loosely to it by electrostatic forces. When the hydrated compound is heated, the water molecules are released as water vapor. The formula of the copper carbonate hydrate, Cu₂CO₃(OH)₂*H₂O, tells us that one water molecule is bound to each copper carbonate hydroxide molecule.
From the ratio of the mass of the black product to the initial 5g placed in the flask, could the remaining black compound be the anhydrous copper carbonate hydroxide molecule Cu₂CO₃(OH)₂? The molecular weight of Cu₂CO₃(OH)₂ is 221.116 g/mol, while that of water is 18.015 g/mol. Show your calculations.
Where the mass is 96.780g before heating and 95.107g after heating. The content is a black powder
96.780g – 95.107g = 1.673 g
1st, determine the fraction of Cu₂CO₃(OH)2 in the hydrated compound, Cu₂CO₃(OH)₂*H₂O.
1 H2O = 18.015
Cu₂CO₃(OH)2 = 221.116
Cu₂CO₃(OH)₂*H₂O = 221.116 + 18.015 = 239.131
fraction of Cu₂CO₃(OH)2 = 221.116 ÷ 239.131
Initial mass of Cu₂CO₃(OH)₂*H₂O = 5 g
Fraction * Initial mass = mass of product after heating
221.116 ÷ 239.131 * 5 = 4.623 grams
This is theoretical yield of the black powder, Cu₂CO₃(OH)₂ from 5 g of Cu₂CO₃(OH)₂*H₂O.
Mass H2O = 5-4.623 = 0.377
Where the mass is 96.780g before heating and 95.107g after heating. The content is a black powder
96.780g – 95.107g = 1.673 g
Since the actual yield of black powder is 1.673 g, some of the hydrated compound must have splattered out of the heating vessel!
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