Rain, rain, go away...
Test results
0 to 14
Acid or Base?
Make it Neutral
Don't be Salty!
Bubbles or not?
The Endpoint
100
Caused by pollution released into the atmosphere.
What is acid rain?
100
Tastes sour.
What is an acid?
100
A scale that goes from 0 to 14 used to study acids and bases.
What is the pH scale?
100
Vinegar
What is an acid?
100
The pH of water.
What is 7?
100
The products of a neutralization reaction.
What is water and a salt?
100
The gas released when a metal reacts with acid.
What is hydrogen (H2)?
100
What is a burette?
200
A consequence of acid rain.
What is killing plant life, erodes limestone or pollutes rivers and lakes?
200
Tastes bitter.
What is a base?
200
Numbers in the pH scale that represent acidic solutions.
What is numbers lower than 7?
200
HCl
What is an acid?
(see table K)
200
Reaction between an acid and a base.
What is a neutralization?
200
A salt
What is an ionic compound?
200
A reference table that would help you decide which metals will react with an acid and which ones will not.
What is table J?
200
The lab procedure used to find the unknown concentration of a solution by reacting it with another solution of known concentration.
What is a titration?
300
The product of combining H+ ions with H2O.
What is a hydronium ion (H3O+)?
300
Reacts with some metals to produce hydrogen gas.
What is an acid?
300
Numbers in the pH scale that represent basic (alkaline) solutions.
What is a number higher than 7?
300
Usually referred to as alkaline.
What is a base?
300
The pH number that represents a neutral solution.
What is pH = 7?
300
The salt that results from the neutralization of HCl with KOH.
What is KCl?
(The H from the acid and the OH from the base make H2O. Whatever is left forms the salt.)
300
A metal that will NOT react with an acid.
What is copper (Cu), silver (Ag) or gold (Au)?
(any metal below H2 in table J)
300
The mathematical equation used to make calculations using data from a titration.
What is
400
Area in the United States where the most acidic rain occurs.
What is the north east area?
(yellow/orange colors represent lower pH = more acidic)
400
Produces OH- (hydroxide ions) when dissolved in water.
What is a base?
400
Compares the acidity of lemon juice (pH 2) and stomach acid (pH 1)
What is stomach acid is 10 times MORE ACIDIC than a lemon juice? or lemon juice is 10 times LESS ACIDIC than stomach acid?
400
H2SO4
What is an acid?
400
The product of combining H+ and OH-.
What is water (H2O)?
400
The salt that results from the neutralization of HNO3 and NaOH.
What is NaNO3?
(The H from the acid and the OH from the base make H2O. Whatever is left forms the salt.)
400
The metal shown here reacting with an acid.
Mg + 2HCl -> MgCl2 + H2
What is magnesium (Mg)?
400
Must be added to the solution being titrated in order to identify the endpoint of the titration.
What is an indicator?
500
The gas produced in the reaction between an acid and a carbonate (like limestone). See reaction.
CaCO3 + H+ -> Ca+2 + H2O + CO2
What is carbon dioxide (CO2)?
500
Produces H+ (hydrogen ions) when dissolved in water?
What is an acid?
500
Compares the acidity of a solution with a pH of 6 and a solution with a pH of 4.
What is a pH of 6 is 100 times LESS ACIDIC than a pH of 4?
500
Baking soda
What is a base?
500
If acid spilled on a river, this would happen to the pH of the river water.
What is a decrease in pH?
(recall that acids have low pH values)
500
H2SO4 + Ca(OH)2 -> 2H2O + _______
What is CaSO4?
(The H from the acid and the OH from the base make H2O. Whatever is left forms the salt.)
500
A metal that WILL react with an acid to produce hydrogen gas.
What is Pb, Zn, Al, Na...?
(mention any metal that is above H2 on table J)
500
The solution color that will signal the correct time to stop the titration.
What is light pink? or the flask at the center?
600
Explains why the reaction between acid rain and limestone is very slow.
What is the acid concentration in rain is low (compared to, let's say, vinegar), and rain water is not always in contact with the limestone?
600
Conducts electricity when dissolved in water.
What is an acid or a base?
(Sorry, trick question. Both acids and bases are conductors of electricity :)
600
The pH of a solution 1000 times MORE ACIDIC than water.
What is a pH of 4?
(recall that water's pH =7)
600
KOH
What is a base?
600
The reason why antiacid tablets, like Tums, help with acid reflux.
What is acid from the stomach that is causing the acid reflux gets neutralized by the antiacid (alkaline) tablet, minimizing the destructive effect of the acid in your esophagus?
600
The acid and base that formed KNO3 in a neutralization reaction.
What is HNO3 (acid) and KOH (base)?
600
A possible reason that explains the difference in reaction rate between magnesium and hydrochloric acid shown here.
What is a difference in concentration, the first tube having the most concentrated acid and the last tube having the lowest concentration?
(High concentration, faster rate of reaction)
600
The molarity of a 20.0 mL sample of an acid that was titrated with 10.4 mL a 0.30M KOH solution.
What is 0.156 M?
MA (20.0mL) = (0.30M)(10.4mL)