Chemical Reactions Flashcards
Outline the definition of chemical reaction;
A transformation in change of composition of a compound
Outline the definition of a reactant or substrate;
Compound undergoing change, most normally incorporated into product
Outline the definition of a reagent;
A common partner of the reactant in many chemical reactions
Outline the definition of a product;
The final form takes by the major reactant(s) of a reaction
Outline the definition of reaction conditions;
Conditions under which the reaction takes place
Outline the definition of stoichiometric coefficients
The integers that precede the formula of each substance
What does direct combination involve?
Two of more substances combining to make a more complex substance
What is decomposition?
One substance is broken down into two or more simpler substances
What is single displacement?
One element trades places with another element in a compound
What is double displacement?
Anions and cations of two different molecules switch places
Outline combustion
When oxygen combines with another compound to form water and carbon dioxide
Are combustion reactions endothermic or exothermic?
Exothermic
When does a neutralisation reaction occur?
Between an acid and a base
What is a chemical yeild?
Amount of product obtained is always less than expected
3 reasons for chemical yield result;
1) many reactions stop before completion
2) competing reagents may consume some of the starting materials
3) when product is purified and isolated some of its inevitability is lost
