Consider a triprotic acid like phosphoric acid or citric acid. which expression correctly describes the relative magnitudes of t
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Answer:
Limiting reagent = lead(II) nitrate
Theoretical yield = 3.75435 g
% yield = 65.26 %
Explanation:
Considering:
Or,
Given :
For potassium chloride :
Molarity = 1.20 M
Volume = 25.0 mL
The conversion of mL to L is shown below:
1 mL = 10⁻³ L
Thus, volume = 25.0×10⁻³ L
Thus, moles of potassium chloride :
<u>Moles of potassium chloride = 0.03 moles</u>
For lead(II) nitrate :
Molarity = 0.900 M
Volume = 15.0 mL
The conversion of mL to L is shown below:
1 mL = 10⁻³ L
Thus, volume = 25.0×10⁻³ L
Thus, moles of lead(II) nitrate :
<u>Moles of lead(II) nitrate = 0.0135 moles</u>
According to the given reaction:
2 moles of potassium chloride react with 1 mole of lead(II) nitrate
1 mole of potassium chloride react with 1/2 mole of lead(II) nitrate
0.03 moles potassium chloride react with 0.03/2 mole of lead(II) nitrate
Moles of lead(II) nitrate = 0.015 moles
<u>Limiting reagent is the one which is present in small amount. Thus, lead(II) nitrate is limiting reagent. (0.0135 < 0.015)</u>
The formation of the product is governed by the limiting reagent. So,
1 mole of lead(II) nitrate gives 1 mole of lead(II) chloride
0.0135 mole of lead(II) nitrate gives 0.0135 mole of lead(II) chloride
Molar mass of lead(II) chloride = 278.1 g/mol
Mass of lead(II) chloride = Moles × Molar mass = 0.0135 × 278.1 g = 3.75435 g
<u>Theoretical yield = 3.75435 g</u>
Given experimental yield = 2.45 g
<u>% yield = (Experimental yield / Theoretical yield) × 100 = (2.45/3.75435) × 100 = 65.26 %</u>
Reacting 1-chloro-2-ethylcyclohexene with hydrogen gas using a platinum catalyst would give a product of 1-chloro-2-ethylcyclohexane.
Hydrogen gas is a reducing agent, which in this reaction, simply mean that the alkene double bond in the cyclohexene will disappear because one of the two bonds forming the double bond (in the alkene) will be connected to a hydrogen atom. The platinum catalyst is necessary to allow the reaction to proceed at a much lower (activation) energy than would have been required.
Hydrogen gas is a reducing agent, which in this reaction, simply mean that the alkene double bond in the cyclohexene will disappear because one of the two bonds forming the double bond (in the alkene) will be connected to a hydrogen atom. The platinum catalyst is necessary to allow the reaction to proceed at a much lower (activation) energy than would have been required.