Acid Rain
pH/ neutralization reactions
Mercury
Balancing equations
Inquiry
100
one of the two main chemicals that cause acid rain
What is nitrogen oxide or what is sulfur dioxide
100
the pH scale goes from ____ to _____
What is 0 to 14
100
What is the chemical symbol for mercury?
What is Hg
100
What is on the left hand side of any chemical equation?
the reactants
100
The Independent Variable is what we________________
change on purpose
200
What is one way in which these chemicals are released?
Burning fossil fuels factories/power plants cars, buses, etc making electricity volcanoes
200
If I dip red litmus paper in a solution and it stays red and then I dip blue litmus paper in and it stays blue, my solution has a pH of ________
What is 7/neutral
200
What state of matter is mercury found in at room temperature?
liquid
200
What does the law of conservation of mass have to do with balancing equations?
mass cannot be created or destroyed so you have to have the same number of atoms in your reactants as you have in your products
200
It is important to have a control group because
we need to have something to compare our results to
300
What is the average pH of rain in CT (you get it right if you are within 0.3 units)?
around 4.5
300
If I add a strong acid to a weak base, the pH of my solution in the end will be ____________
What is lower than 7
300
Name two negative effects that mercury can have on the human body (other than remaining in our body- which is not a negative effect in and of itself)
- birth defects in fetuses - causes organs to malfunction - loss of memory and coordination - infertility
300
What do we call the number that we place before the molecules when balancing equations?
the coefficient
300
A valid experiment is any experiment that does all three of the following:
- has three trials - controls all variables - has careful measurements also accept: has a control group
400
What is the name of one disease that acid rain can make worse in humans?
bronchitis pneumonia asthma
400
What are the products of a reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?
What is NaCl (salt) and H2O (water)
400
What is the primary way that mercury is released into the environment (be very specific!)
burning coal
400
is this equation balanced? If not, which atoms are not balanced? C6H12O6 + 6O2 → 6CO2 + 6H2O
It is balanced
400
why is it important to control all variables in an experiment?
So that your experiment is valid AND so that you know exactly what CAUSED or AFFECTED your results
500
Why might lakes that are formed above limestone be less affected by acid rain than lakes formed on top of granite? (need to use the name for the chemical found in limestone for full credit!)
Limestone is made up of calcium carbonate (same as seashells) and that is slightly basic and reacts with the acid in the rain, which neutralizes some of the acid.
500
What do we call the lab procedure that chemists use to find out the unknown concentration of a base by adding a known concentration of an acid or vice versa?
What is a titration
500
What do we call the process through which mercury builds up as you go up the food chain?
bioaccumulation or biomagnification
500
Balance the following equation: __CH4 + ___O2 -------> ___CO2 + ___H2O
CH4 + 2O2 -------> CO2 + 2H2O
500
The independent variable is found on the ____________ axis and the dependent variable is found on the __________ axis on a graph
IV: x axis DV: y axis
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