Show:
Concentration and Solubility
Describing Chemical Reactions
Solutions
Controlling Chemical Reactions
Chemistry Challenge
100
This is how concentration is measured.
What is grams of solute / grams of solvent?
100
A shorter, easier way to show chemical reactions, using symbols instead of words.
What is a chemical equation?
100
The substance that is dissolved.
What is the solute?
100
The minimum amount of energy required to set a reaction in motion.
What is activation energy?
100
HCl, MgS, & HBr are all examples of this.
What is a chemical formula?
200
A cup of weak coffee is an example of this.
What is a dilute solution?
200
The substances listed on the left side of a chemical equation.
What are reactants?
200
The difference between colloids and solutions.
What is particles are large enough to scatter light in a colloid?
200
A substance used to decrease the rate of a chemical reaction.
What is an inhibitor?
200
A chemical reaction that gives off heat.
What is exothermic?
300
The definition of solubility.
What is a measure of how much solute can dissolve in a solvent at a given temperature?
300
The law of conservation of mass is only true in this situation.
What is for a reaction taking place in a closed system?
300
The type of solution in which more solute can be dissolved.
What is unsaturated?
300
The definition of concentration.
What is the amount of a substance in a given volume?
300
How a chemist might safely determine whether a clear water solution contains a sugar or salt solute.
What is test the conductivity of the solution for the presence of ions? (No electricity = sugar solution!)
400
These are three factors that can affect the solubility of a substance.
What are pressure, type of solvent, and temperature?
400
The correct way to balance this equation: Fe(2)0(3) + C ----> 4Fe + CO (2) *numbers in parenthesis are subscripts!
2 Fe(2)0(3) + 3C -----> 4Fe + 3CO (2)
400
This happens when you add more solute to a saturated solution.
What is the solute does not dissolve?
400
Biological catalysts that increase rates of chemical reactions in living organisms.
What are enzymes?
400
Calculate the concentration of a solution containing 10 grams of solute dissolved in 100 grams of solution.
What is 10%? (10g/100g) X 100% = 10%
500
The reason solubility can be used to identify a substance like sugar which has a solubility of 180g in 100g of water at 0 degrees Celsius.
What is because solubility is a characteristic property of matter?
500
The type of reaction this is: FeS + 2HCL ---> FeCl(2) +H(2)S *numbers in parenthesis are subscripts!
What is a double replacement reaction?
500
What happens to the particles in a solid compound which dissolves completely in a solvent.
What is each of its particles becomes surrounded by the solvent's molecules?
500
These are factors which can be changed to control rates of chemical reactions.
What are surface area, temperature, concentration, catalysts, and inhibitors?
500
These two types of compounds dissolve in water because water molecules are polar.
What are ionic and polar compounds?