Top answers

What is the difference between an exothermic and endothermic reaction?

Exothermic = A reaction that transfers energy to its souroundings therefore the temperature of the sourounding increases (gets hotter). Can you think of an example? E.g. combustion, neutralisation. As heat i...
PE
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Explain the electronic configuration of Sodium (Na) and how this relates to its position in the periodic table.

Firstly we must use the periodic table to look at the number of protons (11) contained within a sodium atom. This tells us how many electrons are contained within the shells of that atom as these two are alw...
LS
Answered by Luke S. • Chemistry tutor
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Which factors should be altered in chemical reaction between zinc (s) and hydrochloric acid (l) in order to speed up the rate of reaction?

Increasing acid concentration- increased number of reactant particles means they are more crowded so there is a greater chance of the particles collidingIncreasing temperature- reactant particles have more e...
FR
Answered by Fatimah R. • Chemistry tutor
3390 Views

Why does increasing the concentration of a reactant increase the rate of reaction?

Increasing the concentration of a reactant is the same as increasing the concentration of squash- there are more particles in a solution and in a given space. More particles mean that there is a greater chan...
RR
Answered by Rhianna R. • Chemistry tutor
4907 Views

What is the difference between and alkane and and alkene?

Alkane's are formed from carbon and hydrogen atoms, a compound known as a hydrocarbon , in single bonds. Alkenes are also hydrocarbons, but contain a double bond. In both compounds, Carbon must always bond t...
GH
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