Concentration

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TABLE OF CONTENTS

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Final Concentration Quiz

Concentration Quiz - Teste dein Wissen

Question

_______ is defined as the amount of solute present in a certain amount of solution.

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Answer

Concentration

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Question

_________ is one that has a significant amount of solute dissolved into it when compared to a _________.

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Answer

Concentrated solution; diluted solution

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Question

What are solutions and solutes?

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Answer

Solutions are heterogenous mixtures or mixtures with a uniform composition.

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Question

What do we use some of the concentration formulas for?

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Answer

We use the molarity equation in temperature dependent situations.

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Question

Which of the following formulas do we use when both units are the same?

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Answer

mass percent

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Question

What’s the molality of a solution prepared from 0.1 kg of sucrose () dissolved into 0.7 kg of water?

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Answer

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Question

Find the volume percent of a solution that’s created by mixing 0.1 L of carbon dioxide and 0.9 L of nitrogen.

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Answer

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Question

Find the concentration of a solution that contains 2 g of carbon dioxide dissolved in, 10,000 g water.

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Answer

You can use ppm just multiply by 10^6 instead and you'll get 199.96 ppm. If you use any other part per x formula just multiply accordingly.

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Question

What's the difference betwen molarity, molality, and mole fractions?

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Answer

Mole fractions are used for dimensionless quantities, while molarity has units of mol/L and molality has units of mol/kg. In addition, mole fractions are also primarily used for gases.

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Question

For this problem, please just identify what formula you would use to solve it.

Problem:

Find the composition of hydrogen in a gas that contains X moles of hydrogen in Y moles of nitrogen to form ammonia.

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Answer

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Question

For this problem, please just identify what formula you would use to solve it.

Problem:

Find the percentage of X g sucrose dissolved in Y g of water.

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Answer

Even though it doesn't say find the mass percentage, the only things you are given are X g and Y g of solute and solution respectively. Thus, it would only make sense for you to use mass percent.

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Question

For this problem, please just identify what formula you would use to solve it.

Problem:

Find the percent of a solution that’s created by mixing X liters of helium and Y liters of nitrogen.

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Answer

Even though the question doesn't specify for us to find the volume percent, we're only given X and Y liters of two different gases. Thus, we can only use volume percent to find the concentration.

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Question

What are some of the concentration formulas that we can use when the solution is very dilute?

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Answer

From the table given above and in the article, we can see that we can use the ppth, ppm, ppb, and even ppt formulas in these cases.

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Question

What are solvents?

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Answer

A solvent is the substance in which another substance, the solute, dissolves into to form a solution.

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Question

When you are given the mass of a solute and the volume of a solution what is the easiest concentration formula to use?

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Answer

The answer is the mass concentration formula because we're given exactly the two components needed to find it.

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Final Concentration Quiz

Concentration Quiz - Teste dein Wissen

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