Stages in analysis 5A Qualitative: Type of chemicals present in sample Quantitative: How much of each chemical is present in the sample Standard procedure = agreed method of working Safe - Effective - Accurate Sample taken...
Brief intro Changing the temp. of tubes containing nitrogen compounds: Heating-> nitrogen dioxide (NO2) gas forms->Colour of solution changes to dark brown Cooling-> nitrogen tetroxide (N2O4) gas forms->Colour of solution gets paler ...
Brief intro Reactions take place->atoms rearranged + bonds broken/made->energy is given out (exothermic) or taken in (endothermic). It is important to understand energy changes so that chemists can control how fast a reaction happens: Too fast=...
The Alkanes – a family of hydrocarbons 2A Physical properties 1) Oily 2) insoluble 3) less dense than H2O, mainly gasses 4) Insoluble - doesn’t mix with H2O States: Gas: 4 carbon atoms Liquid: 4 – 17 carbon atoms Solid:...
Brief Intro Natural resources are converted into useful products. Bulk chemicals produced on a large scale b/c there is a larger demand for them. Fine chemical are produced on a smaller scale. They’re used as feedstock’s (reactants bought by other...