Solvent
What is water considered as, and how much is its pH scale?
Water is considered as universal solvent with a pH level of 7
In a glass of saltwater, which substance is the solute?
Salt
What do you call a solution that can still dissolve more solute at a given temperature?
Unsaturated
What is the term for the maximum amount of solute that can dissolve in a given amount of solvent at a specific temperature?
Solubility
A. What type of substance changes blue litmus paper into red?
B. Which type of substance changes red litmus paper into blue?
A. Acidic Substances
B. Basic Substance
In a solution, it is will always be the greatest amount of the mixture
Solvent
A student mixed 20 g of sugar with 200 mL of water. Which substance is the solute, and why?
Sugar, because it is the substance being dissolved.
What type of solution contains the maximum amount of solute that can dissolve at a given temperature?
Saturated
A student wants sugar to dissolve more quickly but is not allowed to heat the water or crush the sugar. Which factor can the student still change to speed up the dissolving process?
Stirring
A student accidentally touches a slippery cleaning solution. Without knowing its name, what type of substance is it most likely?
Basic Solution
What should you do to increase and have supersaturated concentration of a solution?
Increase the amount of solute
how can you dissolve a solid faster?
Stirring, Crushing, raise temp.
A student keeps adding sugar to a glass of water. After stirring, some sugar remains at the bottom and no longer dissolves. What type of solution has been formed?
Supersaturated
Two students use water at the same temperature and do not stir their solutions. Student A uses a sugar cube, while Student B uses an equal mass of powdered sugar. Which factor causes Student B's sugar to dissolve faster?
Particle size
A scientist wants to prepare a solution that will neither change red litmus paper to blue nor blue litmus paper to red. What type of solution should be prepared?
Neutral Solution
A student believes that the solvent must always be a liquid. Is this statement correct? Explain briefly.
No, a solution can also be both liquid and gasses
When cooper sulfate crystals are dissolved in water, the mixture is known as....
A Solution
solution contains the maximum amount of dissolved solute at room temperature. The student wants to dissolve even more solute without adding more solvent. What should the student do?
Increasing the temperature
Two students dissolve equal masses of sugar in separate cups of water. One uses granulated sugar, while the other uses a sugar cube. Which student's sugar will dissolve first, and why?
The student using granulated sugar because its smaller particles have a greater surface area.
A student tests two unknown solutions. Solution A has a pH of 4 and Solution B has a pH of 11. Which solution is closest to being neutral?
Solution A
A solution contains 80 mL of water and 20 mL of ethanol. Another student concludes that water is automatically the solvent because it has the greater volume. Why is this conclusion incomplete?
The solvent is identified by its role in dissolving the other substance, not only by the greater amount. While water is likely the solvent in this case, amount alone does not always determine the solvent.
A solution is said to be ________ when particles start to build up at the bottom of a solution?
Supersatured
The amount of solute that will dissolve in a certain amount of solution will depend on the _______ of the solution.
Temperature
A student claims that crushing a solid into smaller pieces increases its solubility. Is this statement correct? Explain.
No. Crushing only increases the rate of dissolving by increasing the surface area. It does not increase the maximum amount of solute that can dissolve.
A solution has no effect on either red or blue litmus paper. A student immediately concludes that the solution must be water. Is the student's conclusion correct?
No. The solution is neutral, but it is not necessarily water; other neutral solutions also exist.