Chemistry

A Level Chem

Nitrate

NO3 -

Sulphate

SO4 2-

Carbonate

CO3 2-

Phosphate

PO4 3-

Ammonium

NH4 +

Polyatomic ions

Group of atoms that form an ion

Relative Atomic Mass

Average mass of an element compared to 1/12 atom of carbon-12

Hydroxide

OH -

1 mole of a substance equals

Its Mr as grams

Mole is how many atoms?

6.022×10²³

Ideal Gas Equation

Pressure x Volume = Moles x Ideal Gas Constant x Temperature

In the ideal gas equation, volume is measured in

m³

m³ to dm³

multiply by 1000

m³ to cm³

multiply by 1000000

cm³ to dm³

divide by 1000

To convert degrees to kelvin

Add 273

Ideal Gas Constant

8.314

One atms (atmosphere) is equal to how many pascals (pa)

101000

How to find the empirical formula

Divide percentage composition by MR, then divide all values by the lowest value

% yield

Actual(g) / Theoretical * 100

Atom Economy

Mr of desired x Amount of desired / Mr of all x Amount of all

Generic neutralisation formula?

Acid + Alkali → Salt + Water

When changing volume, what happens to concentration and what happens to moles

Concentration doesn’t change, Moles do.

When in an exam make you sure you

Read the question.

Nuclear attraction is between

Nucleus and Outer e-

For ion equations include

State symbols

Metallic bonds are between?

Two positive metals

Covalent bonds are between?

Two non metals

Ionic bonds are between?

A metal and a non metal

Ionic bond dot and cross looks like?

This