Chapter 5 Flashcards
What is a solution (properties too)? Describe what makes it up and give examples of different solutions.
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What is the solute and solvent when one mixes two liquids?
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What happens to the mass of the solute when it dissolves in a solvent? Give the formula of the mass of a solution.
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What happens to the sugar when we add 5 g of sugar to 100 g of water?
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Is volume conserved in a solution? Explain why this is and why a solution is homogeneous.
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What are some uses of solvents and solutions?
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Compare substances in their solution form rather than in their solid form by using an example.
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Give examples of different solutions in each of the physical states.
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Explain the difference between the three types of solutions. Use an example to illustrate.
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What does solubility depend on?
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What is solubility?
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What is the solubility of salt in alcohol? Why?
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State the solubility of copper sulphate crystals in water using the norms of mass.
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Answer the following questions:
- If 25 g of copper sulphate is added to 100 g of water at 25 degrees Celsius, what happens?
- If 20 g of copper sulphate in 100 g of water at 50 degrees Celsius, what will happen?
- If 40 g of copper sulphate is disoslved in 100 g of water at 60 degrees Celsius, what will happen?
- If 100 g of copper sulphate in 100 g of water at 60 degrees Celsius is added, what will happen?
- What is the maximum mass of copper sulphate which can dissolve in water at (i) 0 degrees Celsius, (ii) 50 degrees Celsius and (iii) 90 degrees Celsius?
The graph on page 101 is to be used.
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Is the salt solution in the Dead Sea dilute, concentrated, or saturated? Explain.
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Describe temperature’s effect on solubility of solids and gasses.
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Think About it Page 103
Answer:
- Which solute is most soluble in water at (i) 0 degrees and (ii) 80 degrees Celsius?
Graph on Page 103
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Describe nature of solute and nature of solvent’s effect on solubility.
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Think About It Page 104
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Which factor affects both solubility and the rate of dissolving? Which factors affect the rate of dissolving but do not affect solubility?
Temperature. Surface Area, how much is already dissolved in the solvent, and stirring rate.
What is an acid? Explain using examples.
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What precautions should be taken when using acids?
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What are the general properties of acids?
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What is the method to remove the shell of a raw egg without breaking it? What is the egg shell made of?
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What are alkalis?
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Name some general properties of alkalis.
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Try It Out and Think About It page 111
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What are indicators? What is litmus?
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Think About It Page 112
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In plants, how can stuff be used as indicators?
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What is the pH scale, and name substances at each pH level. What is used to measure the pH scale? How?
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What happens when we mix acids and alkalis? Explain using an example.
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Give more examples of neutralisation.
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Think About It page 118
Yes, the total mass of the acid and alkali equals the total mass of the salt and water in a neutralization reaction, as mass is always conserved in chemical reactions.
In what ways is using a pH meter better than using the Universal Indicator?
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