Chemical Formulas
Chemical Formula for lithium chloride
LiCl
Identify the type of reaction:
S + O2 --> SO2
Synthesis
Equations need to balanced in order to follow the law of _____________________
Equations need to balanced in order to follow the law of Conservation of Mass
Mass of reactants must always equal the mass of products!
What do all acids produce in solution?
H+ (hydrogen ions)
What are the products of neutralization reactions?
Ionic salt and water
Chemical formula for Barium Iodide
BaI2
Remember the Criss-Cross Method!
Identify the type of reaction:
H2O2 --> H2 + O2
Decomposition
Is the following chemical equation balanced?
Zn + 2HCl → H2 + ZnCl2
Yes it is balanced - the number of atoms of each type of element are the same on both reactant and product side. (i.e there are 2 H atoms on each side)
What ions are present when bases are dissolved in water?
OH- (hydroxide ions) or CO32- (carbonate ions)
How does the pH of an acidic solution change when a base is pipetted into the acidic solution?
The pH will increase (move closer to neutral)
Chemical formula for Nitrogen trichloride
NCl3
Identify the type of reaction:
2 C6H14 (l) + 19 O2 (g) --> 12 CO2 (g) + 14 H2O (g)
Combustion (Complete combustion)
Balance the following equation:
____ Na +____ H2O → ____ NaOH +____ H2
2 Na + 2 H2O → 2 NaOH + H2
Name the following acid:
HBr (aq)
Hydrobromic acid
Neutralization reactions are a special type of what reaction?
Hint: You have already learned this reaction type before....
DOUBLE DISPLACEMENT!
Chemical forumla for Iron (III) sulfate
Fe2(SO4)3
Identify the true statement:
1. Single displacement reactions produce precipitates
2. Synthesis reactions produce a lot of energy
3. Double displacement reactions involve an element reacting with a compound.
The true statement:
2. Synthesis reactions produce a lot of energy
Balance the following Equation:
____CaCO3 + ____ HCl → ____ CaCl2 + ____ H2CO3
CaCO3 + 2 HCl → CaCl2 + H2CO3
Identify the true statement:
1. Acids turn red litmus blue and blue litmus red.
2. Household cleaners are acidic
3. Acids and bases conduct electricity
4. Acids and bases both react with metals
The only true statement:
3. Acids and bases conduct electricity (because they produce ions!)
What is the purpose of an indicator?
To determine if a solution is basic or acidic (also to indicate when you are close to reaching neutralization)
Chemical formula for ammonium chlorate
NH4ClO3
Predict the products:
Ba(OH)2 + Al(NO3)3 --> ____?____ + ____?____
This is a double displacement reaction:
3 Ba(OH)2 + 2 Al(NO3)3 --> 3 Ba(NO3)2 + 2 Al(OH)3
Balance the following chemical equation:
__ C5H12 + __ O2 --> __ CO2 + __ H2O
C5H12 + 8 O2 --> 5 CO2 + 6 H2O
How much more acidic is stomach acid at pH2 than black coffee at pH 5?
a) 1000 times more acidic
b) 30 times more acidic
c) 1000 times more basic
d) 3000 times more acidic
pH2 vs. pH 5 is a difference of 3.
This means there are THREE 10-fold differences
10 x 10 x 10
= 1000 times more acidic
Determine the products of the neutralization reaction (and BALANCE!):
KOH + H2SO4 --> ________ + _________
Remember, neutralization is just a fancy double displacement reaction!
2KOH + H2SO4 --> K2SO4 + 2H2O