8.6A Models of Matter
8.6C Properties of Water
8.6D Acids and Bases
8.6B Chemical Reactions
8.6E Chemical Equations
100
TRUE OR FALSE: Sulfur has one more proton than phosphorus
True
100
What is adhesion, and an example?
Water attracted to other materials, paper towels cleaning up water
100
What is a substance that cannot be broken down chemically or physically?
Element
100
Draw a model of H2O
100
What happens to the total mass as the reaction takes place?
Mass remains constant
200
Does this picture represent an element, compound, or mixture?
Element
200
Define cohesion and provide an example
Water molecules attracted to each other, small droplets coming together to make bigger droplets
200
Which model represents only one compound?
or
200
How many Iron (Fe) atoms are in the chemical equation below?
2Fe(OH)3 --> Fe2O3 + 3H2O
4
200
Do the products and reactants in the equation below have the same or different chemical properties?
Different chemical properties
300
What is a mixture? Name the two types of mixtures
A non-chemical combination of 2 or more substances, homogeneous and heterogeneous
300
Define surface tension
property of a liquid's surface that allows it to resist an external force (film on liquid's surface that lets things float on surface- water strider)
300
Does the following picture represent an acid or base solution?
Base Solution
300
List the elements found in this chemical equation:
N2 + 3H2 -> 2NH3
Nitrogen and Hydrogen
300
How does the equation below represent the law of conservation of mass?
H2 + Cl2 --> 2HCl
There are the same number of elements on each side of the equation
400
TRUE OR FALSE: Phosphorus has one less valence electron than Sulfur
True
400
Define compound
substance composed of at least two different elements
400
Name 3 characteristics of an acid
Sour taste, pH less than 7, turns blue litmus paper red
400
What happens to the mass of a system when a chemical change occurs?
the mass remains constant
400
How do you know that mass is conserved in the chemical equation below?
NaOH + HCl --> NaCl + H2O
2 hydrogen atoms in the reactants and 2 hydrogen atoms in the products
500
Define homogeneous and heterogeneous mixtures
Homogenous mixture looks the same throughout (steel alloy and tea with dissolved sugar), heterogenous mixtures you can see different parts (salad dressing and concrete)
500
What is capillary action, and what is something that uses it everyday?
force that allows water to move upward against gravity, plants move water upward from their roots
500
Which beaker is an acid and which is a base?
Clear Liquid Beaker: Acid
Green Liquid Beaker: Base
500
Name 2 characteristics of a base
soapy to touch, pH greater than 7
500
Draw a molecule and a compound
Compound:
Molecule:
