Caculate the mass of zinc chloride produced from 19.2tones of zinc oxide
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ZnO + 2HCl ==> ZnCl2 + H2O
1. Convert 19.2 tones ZnO to mols. mols = grams/molar mass which means you must convert tones to grams first.
2. Using the coefficients in the balanced equation, convert mols ZnO to mols ZnCl2.
3. Now convert mols ZnCl2 to grams. g = mols x molar mass and convert grams back to tones.(Is that tonnes?)
Note: you can save yourself some time by not convert tonnes to grams in the first place; i.e., in step 1 use 19.2 tonnes directly. Thern in step 3 the answer comes out in tonnes.
To calculate the mass of zinc chloride produced from a given mass of zinc oxide, you need to know the balanced chemical equation for the reaction between zinc oxide and hydrochloric acid.
The balanced equation for this reaction is:
ZnO + 2HCl -> ZnCl2 + H2O
From the balanced equation, you can see that 1 mole of zinc oxide (ZnO) reacts with 2 moles of hydrochloric acid (HCl) to produce 1 mole of zinc chloride (ZnCl2) and 1 mole of water (H2O).
Now, we need to convert the mass of zinc oxide (given as 19.2 tonnes) to moles. To do this, you need to know the molar mass of zinc oxide, which is calculated as the sum of the atomic masses of each element in the compound, Zn and O.
- Zinc (Zn) has an atomic mass of 65.38 g/mol.
- Oxygen (O) has an atomic mass of 16.00 g/mol.
So, the molar mass of zinc oxide (ZnO) is:
65.38 g/mol (Zn) + 16.00 g/mol (O) = 81.38 g/mol.
Now, we can convert the given mass of zinc oxide to moles by using the molar mass:
19.2 tonnes x 1000 kg/tonne x 1000 g/kg / 81.38 g/mol = 2.367 x 10^5 moles
Since the stoichiometry of the reaction tells us that 1 mole of zinc oxide reacts with 1 mole of zinc chloride, we can conclude that the mass of zinc chloride produced is 2.367 x 10^5 moles.
However, if you want to convert this mass back to a more understandable unit like kilograms, you can do so by multiplying by the molar mass of zinc chloride.
The molar mass of zinc chloride (ZnCl2) is calculated as the sum of the atomic masses of each element in the compound, Zn and Cl.
- Zinc (Zn) has an atomic mass of 65.38 g/mol.
- Chlorine (Cl) has an atomic mass of 35.45 g/mol.
So, the molar mass of zinc chloride (ZnCl2) is:
65.38 g/mol (Zn) + 2 x 35.45 g/mol (Cl) = 136.28 g/mol.
Now, you can convert the moles of zinc chloride obtained above to mass in kilograms:
2.367 x 10^5 moles x 136.28 g/mol / 1000 g/kg = 32,236.76 kg
Therefore, the mass of zinc chloride produced from 19.2 tonnes of zinc oxide is approximately 32,236.76 kilograms.