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mihalych1998 [28]
3 years ago
7

Identify the mixture of powdered charcoal and powdered sugar and suggest a technique for separating their components

Chemistry
1 answer:
mihalych1998 [28]3 years ago
5 0
A- Identify the mixture:
The mixture of powdered charcoal and powdered sugar is considered as a homogeneous mixture. This means that you cannot identify the components with naked eye as they are uniformly distributed in the mixture.

B- Separate components:
You ca separate the charcoal powder from the sugar powder using the following steps:
1- add water. Sugar will dissolve in water while charcoal won't.
2- filter the solution where the powdered charcoal will remain on the filter paper and the solution of powder will pass through.
3- boil the sugar solution (above 100 degrees celcius). The water will evaporate and the sugar will precipitate.
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Answer:

% = 76.75%

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Where:

A and A₀: concentrations or mass of the compounds, (final and initial)

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Now to get the value of k, we should use the following expression:

k = ln2 / t₁/₂   (2)

You should note that this expression is valid when the reaction is of order 1 or first order. In this kind of exercises, we can assume it's a first order because we are not using the isotope for a reaction.

Now, let's calculate k:

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With this value, we just replace it in (1) to get the final mass of the isotope. The given time is 1 year or 365 days so:

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<h2>% = 76.75%</h2><h2>And this is the % of isotope after 1 year</h2>
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