# 1_chemical formula and equation

Mind Map by hakiim kamarudin, updated more than 1 year ago More Less
 Created by Sharifah Huda over 5 years ago Copied by Chee Mun Chan over 5 years ago Copied by hakiim kamarudin over 5 years ago
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### Description

advanced placement Chemistry Mind Map on 1_chemical formula and equation, created by hakiim kamarudin on 07/22/2016.

## Resource summary

1_chemical formula and equation
1. Chemical Reaction
1. Is a process where one or more substances is changed into one or more new substances

Annotations:

• Is a process where one or more substances is changed into one or more new substances
1. Reactants to Products
1. Solute
1. Substance that dissolves in solvent
2. Solvent
1. Substance that dissolves solute
1. Solute+solvent+solution
2. Solution
1. Homogeneous mixture of 2 or more substances
1. Number of atoms in 12g of carbon-12 atom
1. 6.002x10^23
2. Moles
1. Number of atoms and molecules
1. Number of moles(mol)=mass(g)/molar mass(g mol^-1)

Annotations:

• Number of moles(mol)=mass(g)/molar mass(g mol^-1)
2. Molar Volume
1. Standard temperature and volume:22.4L mol^-1
1. Volume occupied by 1 mol of gas
2. Chemical formulaes
1. Molecular formula
1. Chemical formula which shows the actual number of atoms in an element
1. n(empirical formula)
2. Empirical formula
1. Chemical formula which shows the simplest ratio of atoms of an element
1. Steps
1. 1)Determine the mass or percentage(by 100g) of elements in the compound

Annotations:

• 1)Determine the mass or percentage(by 100 g) of elements in the compound 2)Divide the mass/percentage of elements with respective relative atomic mass 3)Divide by the smallest number to obtain the ratio 4)Write the empirical formula from the ratio of the elements
1. 2)Divide the mass or percentage of elements with the respective relative atomic mass
1. 3)Divide with the smallest number to obtain the ratio
1. 4)Write the empirical formula from the ratio of the elements
2. Concentration of Solutions
1. A solution is a homogenous mixture of two or more substances
1. solvent + solute(s)
2. Expression
1. Mole Fraction (X)
1. Xa = moles of a / sum of moles of all components
2. Percentage by mass and volume
1. %w/w = (Mass of X / Mass of sample) x100%
1. %w/V = (mass of X (g) / Volume) x100%
1. %v/v = (Volume of X / Volume of Sample) x100%
2. Molality
1. Molality,m = moles of solute (mol) / mass of solvent (kg)
2. Molarity
1. Molarity = moles of solute / liters of solution
1. Units
1. mol L^-1
1. mol dm^-3
1. M

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