A volume of 25.36 ± 0.05 mL 25.36±0.05 mL of HNO 3 HNO3 solution was required for complete reaction with 0.8311 ± 0.0007 g 0.831
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Answer:
Explanation:
Given parameters:
Mass of aluminium oxide = 3.87g
Mass of water = 5.67g
Unknown:
Limiting reactant = ?
Solution:
The limiting reactant is the reactant in short supply in a chemical reaction. We need to first write the chemical equation and convert the masses given to the number of moles.
Using the number of moles, we can ascertain the limiting reactants;
Al₂O₃ + 3H₂O → 2Al(OH)₃
Number of moles;
Number of moles =
molar mass of Al₂O₃ = (2x27) + 3(16) = 102g/mole
number of moles = = 0.04mole
molar mass of H₂O = 2(1) + 16 = 18g/mole
number of moles = = 0.32mole
From the reaction equation;
1 mole of Al₂O₃ reacted with 3 moles of H₂O
0.04 mole of Al₂O₃ will react with 3 x 0.04 mole = 0.12 mole of H₂O
But we were given 0.32 mole of H₂O and this is in excess of amount required.
This shows that Al₂O₃ is the limiting reactant
A water molecule is a polar molecule because of its shape. Its one side is positively charged, while another one side is negatively charged. Two hydrogen atoms and one oxygen atom makes up the molecule. Because the atoms share electrons, the bonds between the atoms are called covalent bonds.
Since its bonds are symmetrical, carbon dioxide is nonpolar. The bonds between the carbon and two oxygen atoms are polar; however, the entire molecule is nonpolar because the partial charges cancel each other.
Hydrogen and chlorine are the two different molecules that makes up HCI. It is nonpolar when a covalent compound is compound among the same elements or bonds between H and C. On the other hand, it is polar when there are two or more different elements present.
Four Carbon-Hydrogen single covalent bonds is contained in methane’s molecule and these covalent bonds are specified as nonpolar covalent bonds. There is no charge separation (dipole moment) due to the equal sharing of electrons.
