Show:
Mixtures
Molecules and Compounds
Acids and Bases
Solutions
Random
100
Mixtures are 2 or more substances that (are, are not) chemically combined.
Mixtures are 2 or more substances that are not chemically combined.
100
How many atoms of carbon are present in CH4? (Re-write on board, no subscript available in jeopardy)
There is one atom of carbon in CH4
100
Acids taste ________.
Acids taste sour.
100
A solution is another name for a _____________ mixture
A solution is another name for a homogeneous mixture
100
What is the atomic number the number of?
The atomic number is the number of protons in an atom.
200
What is the name of the type of mixture where you CAN see the different substances?
A heterogeneous mixture.
200
When two elements combine to form a compound, the elements (keep, lose) their original properties.
When two elements combine to form a compound, the elements LOSE their original properties.
200
Bases taste __________ and feel __________.
Bases taste bitter and feel slippery.
200
Salt is dissolved into water. Name the solute and the solvent.
Solute = salt. Solvent = water.
200
What is the atomic mass the number of?
The atomic mass is the number of protons plus the number of neutrons in an atoms nucleus.
300
What is the type of mixture where you cannot see the different substances?
A homogeneous mixture.
300
How many atoms of oxygen are present in C6H12O6? (Re-write on board, no subscript available in jeopardy)
There are 6 atoms of oxygen present.
300
Water (a neutral substance) should have a pH of ________.
Water (a neutral substance) should have a pH of 7.
300
How can we make solutes dissolve into a solvent more quickly? (3 techniques for full points)
Crushing the solute, stirring the solution, or heating the solution
300
Identify the charges of each subatomic particle (positive charge, neutral charge, negative charge) -Protons -Neutrons -Electrons
-Protons - positively charged -Neutrons - neutral charge -Electrons - negatively charged
400
Name 3 out of the 5 mixture separation techniques we learned.
Using a magnet, hand separation, filtering, sieving, and evaporation
400
How many atoms in total are present in gasoline: C8H18? (Re-write on board, no subscript available in jeopardy)
There are 26 atoms in total present in gasoline: C8H18
400
A solution with a pH of 2 is a (strong, weak) acid.
A solution with a pH of 1 is strong acid.
400
A substance's ______________ is the ability of a solute to dissolve into a solvent
A substance's SOLUBILITY is the ability of a solute to dissolve into a solvent
400
How would we separate a mixture of sand, salt, and water?
First, filter the sand out. Then, evaporate the water, leaving the salt.
500
Why can we use physical separation techniques to separate mixtures but cannot use physical techniques to separate compounds?
We can use physical separation techniques to separate mixtures because they are NOT chemically bonded together. We cannot use physical techniques to separate compounds because compounds are chemically bound together.
500
Explain the difference (and similarity) between a compound and a molecule.
A molecule is any 2 or more elements bonded together. A compound is a molecule that has 2 or more DIFFERENT elements. A molecule can be 2 or more of the same element or 2 or more of different elements.
500
A substance with a pH of 10 is a (strong, weak) ___________. (2 terms for full credit!)
A substance with a pH of 13 is a weak base
500
What is the trend for the solubility of most solutes when dissolved into increasing temperatures of solvents?
Usually, as the temperature of the solvent increases, the solubility of the solute increases as well.
500
How would we separate a mixture of nails, sand, and salt?
First, use a magnet to remove the nails. Second, add water. Third, use filter to remove the sand, leaving salt and water. Lastly, evaporate the water.