Sodium Chloride is decomposed into the elements sodium and chlorine by means of electrical energy. How many grams of chlorine gas can be obtained from 2.5 moles of sodium chloride?
2NaCl ==> 2Na + Cl2
2.5 mols NaCl will give you 2.5 x (1 mol Cl2/2 mols NaCl) = xx mols Cl2.
Convert that to grams Cl2.
1.25 g
To determine the number of grams of chlorine gas that can be obtained from 2.5 moles of sodium chloride, we need to consider the molar ratio between sodium chloride and chlorine gas.
The molar ratio is based on the balanced chemical equation for the decomposition of sodium chloride:
2 NaCl → 2 Na + Cl2
From the equation, we can see that for every 2 moles of sodium chloride, 1 mole of chlorine gas is produced.
Therefore, the molar ratio between sodium chloride and chlorine gas is:
2 moles NaCl : 1 mole Cl2
To calculate the number of moles of chlorine gas, we can use the given 2.5 moles of sodium chloride and the molar ratio:
(2.5 moles NaCl) x (1 mole Cl2 / 2 moles NaCl) = 1.25 moles Cl2
Finally, we can convert the moles of chlorine gas into grams using the molar mass of chlorine:
Molar mass of Cl2 = 2(atomic mass of Cl) = 2(35.45 g/mol) = 70.90 g/mol
Grams of Cl2 = (1.25 moles Cl2) x (70.90 g/mol) = 88.625 grams of chlorine gas.
Therefore, 2.5 moles of sodium chloride can produce 88.625 grams of chlorine gas.
To find the number of grams of chlorine gas that can be obtained from 2.5 moles of sodium chloride, we need to use the concept of stoichiometry, which relates the number of moles of one substance to the number of moles of another substance in a chemical equation.
The balanced chemical equation for the decomposition of sodium chloride (NaCl) into sodium (Na) and chlorine (Cl2) is:
2 NaCl → 2 Na + Cl2
According to the equation, for every 2 moles of NaCl, we get 1 mole of Cl2. Therefore, if we have 2.5 moles of NaCl, we can determine the moles of Cl2 obtained using the following ratio:
2 mol NaCl : 1 mol Cl2
Since 2.5 moles of NaCl is halfway between 2 and 3 moles, it falls closer to 3 moles. Therefore, we can multiply the number of moles of NaCl by the ratio of moles of Cl2 per moles of NaCl:
2.5 mol NaCl × (1 mol Cl2 / 2 mol NaCl) = 1.25 moles of Cl2
Now, to convert the moles of Cl2 to grams, we need to use the molar mass of chlorine gas, which is approximately 70.90 g/mol. So, we can multiply the moles of Cl2 by the molar mass:
1.25 mol Cl2 × 70.90 g/mol = 88.63 grams of Cl2
Therefore, approximately 88.63 grams of chlorine gas can be obtained from 2.5 moles of sodium chloride.