Classifying the Reaction
What type of reaction occurs when
2 Na (s) + Br2 (l) --> 2 NaBr (s)
Synthesis (only 1 product was formed)
What is the correct type of particle for NiO?
Since Nickel is a metal, and Oxygen is a nonmetal, they make an ionic compound.
The correct type of particle for ionic compounds are formula units.
True or False:
When balancing, you should start with the highest something-to-one ratio.
True
The chemicals formed in a chemical reaction are called
Products
True or False: Halogens can only replace Halogens, not metals.
True. Halogens replace Halogens, Metals replace Metals.
One compound is breaking down into two things...Decomposition
How many moles are made in 42.83 grams of Phosphorous (P)?
Gram is your starting unit so it will go on the bottom of the conversion factor. Since mole is in the problem and you are not changing the chemical, only 1 step is required. To get grams, look on the periodic table. The molar mass for Phosphorous is 30.97 g/mol.It's always how many grams are in 1 mole.
42.83 g P divided by 30.97 gram (with 1 mole on top) = 1.38 moles P
Balance the following
__ H2 (g) + __ N2 (l) --> __ NH3 (l)
3H2 (g) + N2 (l) --> 2 NH3 (l)
a reaction that involves an exchange of ions between two compounds
Double Replacement
Two compounds will switch ions to produce two new compounds
Does the reaction occur?
Sodium Chloride and Iodine react
No, the reaction does not take place as Iodine is not above Chlorine
What type of reaction occur when Aluminum Chloride and Oxygen react to produce Aluminum Chloride and Oxygen Dichloride?
Oxygen is a reactant, thus this is combustion
What is the molar mass of C5N3O2?
Molar mass is how many grams are in 1 mole. Add up the mass of the elements.
There are 5 Carbons at 12.01 g/mol each = 60.05 g/mol
There are 3 Nitrogens at 14.01 g/mol each =42.03 g/mol
There are 2 Oxygens at 12.01 g/mol each = 24.02 g/mol.
Add them up and you'll get 126.1 g/mol
Balance the following
_ AgCl2 (s) + _ B2Br6 (l) -> _ AgBr2 (s) + _ BCl3 (aq)
3 AgCl2 (s) + _ B2Br6 (l) -> 3 AgBr2 (s) + 2 BCl3 (aq)
The mass in grams of one mole of any pure substance
Molar Mass
Does the following reaction take place?
Pb(OH)2 + Cr --> ?
Your products would be Cr(OH)2 + Pb
Aqueous Solution of Sodium Nitride and Barium Chloride react to produce the precipitate Barium Nitride and aqueous Sodium Chloride.
Two compounds form two new compound...Double Replacement
8.3 x 1021 atoms of Potassium is converted to grams. How many grams will there be?
No moles = 2 steps. You are starting with atoms, a type of particle, so it'll go on the bottom with 1 mole on top of the first conversion. Since you are solving for grams, grams will go on the top of the second conversion. 1 mole will fill in the empty blanks.
8.3 x 1021 atoms K divided by Avogadro's number times 39.10 g = 0.5389 g K or 0.54 g K
Balance the following
__ H2N + __ N2S --> __ S4H6 + __ N2
6 H2N + 8 N2S --> 2 S4H6 + 11 N2
A solid produced during a chemical reaction in a solution is called:
Precipitate
Does the reaction take place?
Cadmium Oxide and Tin
No, Tin is not more reactive than Cadmium, thus no reaction will take place.
Magnesium reacts with Chromium Fluoride to try to produce Chromium and Magnesium Fluoride
What type of reaction is this, and will the reaction take place?
Single Replacement (Element reacts with compound to potentially produce a new compound, leaving a different element by itself)
This reaction WILL take place as the metal Magnesium is higher on the activity series than Chromium, thus it has more energy to replace it.
195.80 grams of Cobalt (II) Hydroxide ( Co(OH)2 ) is converted to the correct type of particle. How many of the correct type of particles are there?
Co(OH)2 is an Ionic compound so the correct type of Particle is a formula unit. You are starting with grams, so grams will be on the bottom. Be sure to account for Cobalt, 2 Oxygens, and 2 Hydrogens as the 2 on the outside of the () distributes to both. In the second step, avogadro's number will be on top.
195.80 g Co(OH)2 divided by 92.949 grams times avogadro's number = 1.27 x 1024 formula units.
Balance the following
_ HF (g) + _ N2O4 (g) --> _ N3F2 (g) + _ HO3
4 HF (g) + 3 N2O4 (g) --> 2 N3F2 (g) + 4 HO3
The process by which the atoms of one or more substances are rearranged to form different substances
Chemical Reaction
A little more of a challenge, you wont see one of these on the test.
Sodium is dropped in cold water. Will it react? Why?
Water is H2O. Since Sodium is more reactive than Hydrogen in cold water, it will react.
This would make Sodium Oxide and produce Hydrogen gas.
H2O + Na --> Na2O + H2