Saturation
What is the solution called when you can dissolve more solute?
Unsaturated solution
When a substance does not dissolve in a solvent, it is called _________.
Insoluble.
The maximum amount of solute that can dissolve in a solution is called _________
Solubility
Fill in the blank:
All matter is made of ________.
Particles.
(Atoms is also correct)
A solution that has very little solute dissolved in the solvent is called a ______ solution.
Dilute
Contains more solute than would normally be dissolved in the solution.
Supersaturated solution
Water is often called the _______________ solvent
Universal
When the surface are is ___________________, the solute dissolves slower.
Decreased or Smaller
What is required for a substance to be considered a pure substance?
All of the particles should be identical.
(It should be made up of one type of particle.)
What is a Concentrated solution?
A solution that contains a large amount of dissolved solute in the solvent.
What is the process when a substance is broken apart because it is attracted to other particles. (Don't overthink it!)
Dissolving
What is the solvent in your blood?
Water
A physical motion that will help the dissolving process happen faster.
Stirring/Mixing
Rank the states of matter according to the amount of space between particles, from most space to least space.
1.Gas
2.Liquid
3.Solid
You make a very large 500ml cup of chai which contains 50g of sugar. What is the concentration of sugar in your cup?
Mass (g)/Volume (ml) = Concentration (g/ml)
50g/500ml = 0.1g/ml
How can I get more sugar into a solution without it settling to the bottom?
Heat the solution.
True or False - Why?
When I make a solution of oil and water, I can calculate the concentration of oil in this solution.
False. I cannot make a solution of oil and water.
Oil does not dissolve in water. This is a mechanical/heterogenous mixture.
The solubility of salt in water is 36g/100ml at a temperature of 20C. How much salt is in a 250ml saturated solution of salt water at the same temperature?
90 grams
The particle theory states that “All particles are always moving”. What is the name of the theoretical temperature at which particles would no longer move?
Absolute Zero
(0 Kelvin / or -273.15 Celsius)
[Extra time - can use calculator/pencil/paper]
If the concentration of sugar in 100ml of juice is 0.5g/ml, and a bottle of 250ml of chocolate syrup contains 150g of sugar. Which one is sweeter?
Chocolate syrup.
The concentration of sugar in the syrup is 150g/250ml = 0.6g/ml.
Since the concentration of sugar in syrup is higher than in juice, it is sweeter (It has more sugar per ml of solution).
If a bottle of medicine pills says "Do Not Chew", suggest a reason why it might be dangerous to chew a pill instead of swallowing it whole.
(hint: medication dissolves in the acid in your stomach)
Crushing increases surface area, which means the pill will dissolve much faster in the stomach. This can cause your body to absorb the medicine too quickly, or quicker than intended which can cause bad side effects.
True or False - Why?
If the solubility of sugar in water is 200g per 100ml at a temperature of 20C, then the solubility of sugar in oil is the same.
False.
Sugar does not dissolve in oil - it cannot have a solubility number.
If you dissolve 50ml of substance A in 100ml of substance B, the resulting solution will have a total volume less than 150ml. Why is that? (Use the particle theory)
The particles of solvent attract the particles of solute and break them apart, so the particles of solute fit in the gaps between the particles of solvent packing up in the empty spaces.
All particles have forces of attraction keeping them together, some have very strong bonds. What is needed to break bonds between particles?
Energy (heat is also accepted)
[Extra time - you can use calculator/pencil/paper]
The concentration of sugar in apple juice is 0.1g/ml. The concentration of sugar in lemonade is 0.2g/ml. If I mix 250ml of apple juice with 250ml of lemonade, what is the total mass of sugar in my new solution?
Step 1: mass of sugar in apple juice = concentration*volume = 0.1g/ml * 250ml = 25g
Step 2: mass of sugar in lemonade = concentration*volume = 0.2g/ml * 250ml = 50g
Step 3: Total mass of sugar = 25g+50g=75g
(optional: can award partial points)