If too much of Na2Co3 is added to a particular chemical reaction, there will be a shortage of the other reactant which is supposed to react with the Na2Co3 and this will leads to excess production of the product. Stoichiometric should always be used to obtain information about the appropriate quantities of chemicals that should be used during chemical reactions.
Answer:
Amount of Ca(NO3)2 produced = 14.02 g
Explanation:
The given reaction can be depicted as follows:
Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O
Since it is given that HNO3 is in excess, the limiting reactant is Ca(OH)2
Now, Mass of Ca(OH)2 = 6.33 g
Molar mass of Ca(OH)2 = 74 g/mol
![Moles\ Ca(OH)2 = \frac{Mass}{Molar\ Mass} = \frac{6.33 g}{74 g/mol} =0.0855](https://tex.z-dn.net/?f=Moles%5C%20Ca%28OH%292%20%3D%20%5Cfrac%7BMass%7D%7BMolar%5C%20Mass%7D%20%3D%20%5Cfrac%7B6.33%20g%7D%7B74%20g%2Fmol%7D%20%3D0.0855)
Based on the reaction stoichiometry:
1 mole of Ca(OH)2 forms 1 mole of Ca(NO3)2
Therefore, moles of Ca(NO3)2 produced from the moles of Ca(OH)2 reacted = 0.0855 moles
Molar mass of Ca(NO3)2 = 164 g/mol
![Mass\ Ca(NO3)2 \ produced = moles*molar\ mass \\= 0.0855\ moles*164\ g/mol = 14.02\ g](https://tex.z-dn.net/?f=Mass%5C%20Ca%28NO3%292%20%5C%20produced%20%3D%20moles%2Amolar%5C%20mass%20%5C%5C%3D%200.0855%5C%20moles%2A164%5C%20g%2Fmol%20%3D%2014.02%5C%20%20g)
Explanation:
An atom consists of electrons, protons, and neutron. The protons and neutrons are present inside the nucleus whereas the electrons are present outside the nucleus.
These electrons revolve around the nucleus in circular motion. Therefore, an electron pair surrounds the central atom of a molecule. It is known that an electron contains a negative charge and like charges repel each other.
Hence, in an atom the force of repulsion between electron pairs pulls the atoms away from each other.
As a result, a molecules atoms are as far away from each other as they can get.
Act professionally and use common sense.
Wear proper attire.
Locate safety equipment.
Respect animals.
Use chemicals and glassware safely.
Use heat and fire safely.
Clean up spills and broken glass carefully and place waste in proper containers.
Know rules for treating injuries and putting out fires.
The oxidation number of oxygen in the carbonate ion found in malachite would be -2.