1) Empirical formula for zinc chloride (show calculation)
2) Balanced chemical equation for the formation of zinc chloride from zinc and HCL
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#2 is Zn + 2HCl ==> ZnCl2 +H2
You can add phases if that is needed.
1) The empirical formula shows the simplest ratio of atoms in a compound. To determine the empirical formula for zinc chloride, we need to know the mass or percentage composition of each element in the compound.
Assuming we have the masses of zinc and chloride available, we can follow these steps:
Step 1: Determine the mass of each element
Let's assume we have 20 grams of zinc (Zn) and 35.5 grams of chloride (Cl).
Step 2: Convert mass to moles
To convert mass to moles, we divide the mass by the molar mass.
The molar mass of Zn is 65.38 g/mol, while the molar mass of Cl is 35.45 g/mol.
moles of Zn = 20 g / 65.38 g/mol = 0.306 mol
moles of Cl = 35.5 g / 35.45 g/mol = 1.003 mol
Step 3: Divide by the smallest mole value
To obtain the simplest ratio, we divide both moles by the smallest mole value, which is 0.306 mol.
moles of Zn = 0.306 mol / 0.306 mol = 1
moles of Cl = 1.003 mol / 0.306 mol ≈ 3.28
Step 4: Round to the nearest whole number
After dividing, we round the numbers to the nearest whole number to have an empirical formula.
The empirical formula for zinc chloride is ZnCl3.
2) The balanced chemical equation for the formation of zinc chloride (ZnCl2) from zinc (Zn) and hydrochloric acid (HCl) is as follows:
Zn + 2HCl -> ZnCl2 + H2
In this equation, one zinc atom reacts with two hydrochloric acid molecules to produce one molecule of zinc chloride and one molecule of hydrogen gas.
1) To find the empirical formula for zinc chloride, we need the mass of zinc and chlorine that is present in the compound.
Step 1: Determine the mass of zinc (Zn) and chlorine (Cl)
Zinc has an atomic mass of 65.38 g/mol, and chlorine has an atomic mass of 35.45 g/mol.
Step 2: Find the number of moles of zinc (Zn) and chlorine (Cl)
Assuming we have 100 grams of zinc chloride, we need to find the number of moles for each element. To do this, divide the mass of each element by its molar mass.
Number of moles of Zn = mass of Zn / molar mass of Zn
Number of moles of Zn = (mass of ZnCl2) - (2 * mass of Cl) / molar mass of Zn
Number of moles of Cl = mass of Cl / molar mass of Cl
Number of moles of Cl = (mass of ZnCl2) - (2 * mass of Zn) / molar mass of Cl
Step 3: Determine the mole ratio
The mole ratio is the ratio between the number of moles of each element in the compound. Divide the number of moles of each element by the smallest number of moles obtained from Step 2. This will give you the simplest whole number ratio.
Step 4: Write the empirical formula
Using the mole ratio obtained from Step 3, write the empirical formula by representing the elements and the mole ratio in their simplest whole number form.
2) The balanced chemical equation for the formation of zinc chloride from zinc and HCl can be determined by understanding the reaction between these two substances.
The reaction can be represented as follows:
Zn + 2HCl → ZnCl2 + H2
In this equation, zinc reacts with hydrochloric acid to form zinc chloride and hydrogen gas. The coefficient "2" in front of HCl indicates that it requires two molecules of hydrochloric acid for the reaction to occur. The coefficient "1" in front of ZnCl2 and H2 represents that one molecule of zinc chloride and one molecule of hydrogen gas are formed during the reaction. This equation ensures that the number of atoms on both sides of the reaction is balanced.