Short Answer
We learned about 5 examples of characteristic properties of matter. Name 4
Color, Solubility, Density, Melting point, Boiling point, Freezing point.
A new element called Breitenfeldium is discoverd. It has 8 valence electrons. Will Breteifneldium be a very reactive or unreactive element?
Unreactive.
What is the definition of matter?
Concentration of matter
How would you separate a mixture of two liquids?
By boiling away one liquid
What is a solute?
A substance that can be dissolved.
What are the two types of pure matter?
Elements and compounds
A unknown change in matter requires a large amount of energy. Would it be a chemical or physical change?
Chemical change involve large amounts of energy
What is the formula for matter?
Density = Mass/volume
How could you separate a mixture of 2 solids?
Using solubility or potentially magnetism.
What is a solvent?
A substance doing the dissolving.
Which would have the higher boiling point? 5 grams of lead or 10 grams of lead?
Would have the same boiling point.
An unknown metal is cut into two pieces. Would this be considered a chemical or physical change?
Physical change.
A block of lead has dimensions of 4.5cm by 5.20cm by 6.00cm. The block weighs 1587grams. From this information, calculate the density of lead.
11.3g/mL
What is the formula for concentration?
(Solute/Solvent) x 100
Daily Double!!!!!!!
What is concentration?
A measure of amount of solute in a given amount of solvent.
An unknown substance has a melting point of 20 degrees Celsius. What is its freezing point?
20 degrees Celsius
10grams of chemical A are reacted with 5 grams of chemical B to from the compound AB. How much of compound AB will form?
15 grams.
How could you separate a mixture of a solid dissolved in a liquid?
By boiling away the liquid.
If 23.56g of a substance will dissolve in 124mL of solvent to form a saturated solution, what is the solubility of the substance?
19g/ml
What is the definition of solublility?
Ability to be dissolved
Amount of solute that can dissolve in a solvent or the amount of solute in a given amount of solvent in a saturated solution.
How could you measure the volume of an irregularly shaped object?
Using the displacement of water technique.
Use the following data, calculate the concentration of the solution.
Mass of boiling dish: 246.78g
Mass of boiling dish + solution: 312.89g
Mass of boiling dish + solute: 258.83 g
22.3g/mL
What would a graph for boiling point look like?
Teacher approval.
What would a graph for boiling AND freezing point look like?
Teacher approval.
What is a saturated solution?
A solution that contains all the solute that the solvent can possibly dissolve.