ROD Vocab
A MIXTURE of two or more substances that are evenly mixed.
Solution
Warming a pot of salted water on the stove.
INCREASE the rate of dissolution
Identify the coefficient: 7H2SO4
The coefficient is 7.
Calculate the total number of atoms: 2Na2(SO3)2
Total atoms = 20
Vocab: The small number following an element tells how many atoms of that element.
Subscript
The substance that is DISSOLVED into a solution.
Solute
When making Kool-aid I poured a Kool-aid packet into ice cold water.
DECREASE the rate of dissolution.
Identify the subscript for Oxygen: CaCO3
The subscript of Oxygen is 3.
Calculate the total number of atoms: 3Sr(HPO4)3
Total atoms = 57
Vocab: The large number in front of a chemical formula.
Coefficient
The substance that DISOLVES another substance.
Solvent
Breaking a bath bomb into multiple pieces before putting it in the tub.
INCREASE the rate of dissolution.
Identify the coefficient: Fe2O3
The coefficient is 1.
Calculate the total number of atoms: 6Ba3Cd(PO3)4
Total atoms = 120
You have three glasses:
Glass 1 = Powdered sugar
Glass 2 = Granulated sugar
Glass 3 = Sugar cube
If each glass is filled with the same amount of water, which glass will dissolve the fastest?
Glass 1, with powdered sugar, will dissolve the fastest.
The process of DISSOLVING a substance.
Dissolution
My sister was crying for hot chocolate so I began stirring her drink more quickly.
INCREASE the rate of dissolution.
Identify the total subscript of Hydrogen: CH3OH
The total subscript for Hydrogen is 4.
Calculate the total number of atoms: 4(Na2Ca)2AlF6
Total atoms = 52
You have three glasses of water:
Glass 1 = 10*
Glass 2 = 46*
Glass 3 = 92*
If each glass is filled with the same amount of water, which one will a tablespoon of sugar dissolve into most slowly?
Glass 1 (10*) will dissolve the sugar most slowly.
The ratio of solute in a solution.
Concentration
I dropped a sugar cube into cold water and didn’t stir.
DECREASE the rate of dissolution.
Identify all of the coefficients and subscripts for the following formula: 3C12H22O11
The coefficient is 3.
The subscript for Carbon is 12.
The subscript for Hydrogen is 22.
The subscript for Oxygen is 11.
Calculate the total number of atoms: 2(PO4)2(NaCl2)2
Total atoms = 32
Calculate the total number of atoms: 3CH8N3O3P
Total atoms = 48