Aqueous Solutions
What is an aqueous solution?
An aqueous solution is a liquid homogeneous solution in which water is the solvent.
Who is the universal solvent?
Water
Will coarse or fine table salt dissolve faster in a beaker of warm water?
Fine table salt
Give an example of chemical change
Answers may vary.
Iron rusting, baking cookies, burning wood
Whipping eggs, boiling water, dissolving sugar, and dicing vegetables are examples of what kind of change?
Physical Change
Examples of an aqueous solution.
carbonated soda lemonade kool aid rainwater seawater sugar/salt water
The term that describes a liquid homogeneous mixture made of two or more substances?
Solution
2 g of salt is placed into a glass of cold water and also into a glass of warm water. Which glass will have the fastest rate of dissolution?
Hot/warm water
How many substances join to form new chemical properties?
Two or more
Give an example of a physical change
Answers may vary.
Melting ice
Ammonia can be dissolved in water to form a solution of ammonia for cleaning. Aqueous solution or no aqueous?
Aqueous solution
How could the salt water solution be diluted?
increasing the amount of collisions between the solute and the solvent is called
Agitation
Is mixing water and sugar a chemical change?
No, if you evaporate water the sugar would still be left
Give two evidences of a physical change
Change in form, shape, size, or phase.
Ink is able to be formed when certain colored dyes dissolve in alcohol.
Non-aqueous solution
Which aqueous solution is most concentrated?
10 g of solute in 100 mL water
20 g of solute in 100 mL water
20 g solute in 100 mL of water
The three factors that affect the rate of dissolution are
Agitation
Temperature
Surface Area
A chemical change is when bonds between atoms are broken and created to form what?
Form a new substance
What are the 3 main states of matter?
Solid, liquid, gas
What is concentration?
a solution with a high amount of solute compared to solvent
What is dilution?
the process of adding more solvent to a solution
What does surface area mean?
A larger surface area means more of the solute's particles are exposed to the solvent, leading to more frequent collisions and a faster rate of dissolution
When a chemical reaction between substances gets heat, it is all because of what element?
Oxygen
What is the difference between a physical change and chemical change?
Chemical change creates a new substance and physical change does not. Physical change is reversible while chemical change is irreversible.