An empty beaker has a measured mass of 27.234 g. When some salt is added to the beaker, the combined mass is 35.9564 g. Calculat
1 answer:
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<u>Answer:</u> The theoretical yield of acetanilide is 6.5 grams.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
.....(1)
- <u>For aniline:</u>
Given mass of aniline = (We know that:
)
Molar mass of aniline = 93.13 g/mol
Putting values in equation 1, we get:
- <u>For acetic anhydride:</u>
To calculate the mass of acetic anhydride, we use the equation:
Volume of acetic anhydride =
Density of acetic anhydride = 1.08 g/mL
Putting values in above equation:
Given mass of acetic anhydride = 6.08 g
Molar mass of acetic anhydride = 102.1 g/mol
Putting values in equation 1, we get:
The chemical equation for the reaction of aniline and acetic anhydride follows:
By Stoichiometry of the reaction:
1 mole of aniline reacts with 1 mole of acetic anhydride
So, 0.048 moles of aniline will react with = of acetic anhydride
As, given amount of acetic anhydride is more than the required amount. So, it is considered as an excess reagent.
Thus, aniline is considered as a limiting reagent because it limits the formation of product.
By Stoichiometry of the reaction:
1 mole of aniline produces 1 mole of acetanilide
So, 0.048 moles of aniline will produce = of acetanilide
Now, calculating the theoretical yield of acetanilide by using equation 1:
Moles of acetanilide = 0.048 moles
Molar mass of acetanilide = 135.17 g/mol
Putting values in equation 1, we get:
Hence, the theoretical yield of acetanilide is 6.5 grams.
Answer:
The correct answer is B.
The is samller than
of the reaction . So,the reaction will shift towards the left i.e. towards the reactant side.
Explanation:
Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as
K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.
For the given chemical reaction:
The expression for is written as:
Given : = 0.0454
Thus as , the reaction will shift towards the left i.e. towards the reactant side.
Two or more compounds that have same molecular formula but differ in the arrangement of atoms in molecule and thus posses different properties are known as isomers.
The molecular formula of pentane is substituting one hydrogen from pentane with bromine results in the formation of monobromo derivatives of pentane having molecular formula,
.
The structure of monobromo derivatives of pentane that is 1-bromopentane, 2-bromopentane, and 3-bromopentane and having molecular formula, is shown in the image.
The other two arrangements of monobromo derivatives of pentane that is 2-bromo-2-methylbutane and 2-bromo-3-methylbutane is shown in the image.
There are different structures of monobromo derivatives of pentane having molecular formula, which contain a 4-carbon chain are 1- bromo-2-methylbutane and 1-bromo-3-methylbutane shown in the image.
