some chem i need to remember

why surface area affects rate of reaction rate.

because more particles are exposed to reactants

catalysts

Catalyst reduce reaction time and enables products to be made quickly without being used up

enzymes

enzymes are biological catalysts

covalent compound (1,2,3,4,5)

Mono, di, tri, tetra, penta

covalent compound(6,7,8)

hexa,hepta,octa.

Explain what a catalyst is and give an example of a catalyst.

Catalysts : A catalyst is a substance that increases the rate of a chemical reaction without being used up.

 

Catalysts enables/helps the reaction to occur at a lower temperature.

 

Example: Catalytic convertors(containing Platinum) in the car converts toxic carbon monoxide into carbon dioxide

what is activation energy

Activation energy is the minimum amount of energy needed to start a chemical reaction.

 

Factors that affect rate of a reaction are

1.Concentration

2. Temperature

3. Pressure

4. Surface area

5. Catalysts/enzymes

6. Agitation (stirring)

ionic bond

formed by the transfer on electrons between metal and non metal, metal lose electron and make cation and gain charge. Non metal gain electron and lose charge

Covalent bond

formed by sharing of valence sharing electrons between 2 or more non metals.

metallic bond

A metallic bond is formed by the transfer of electrons between metal ions and a shared "sea" of freely moving, delocalized electrons