Neutralisation - I am going to see whether changing the concentration of NaOH will affect the heat produced when mixed with HCL.

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Neutralisation

Aim

 I am going to see whether changing the concentration of NaOH will affect the heat produced when mixed with HCL.

Background knowledge

Neutralisation is when an alkali is added to an acid to produce a liquid with the pH7.

This is the equation for neutralisation is:  Acid + alkali = salt + water

Or in terms of ions       H+  +  OH-  = H2O

The pH scale is a scale from one to fourteen.  Fourteen being a really strong acid, the strongest acid there is, seven being a neutral liquid known as H2O and one being a strong alkali.

An exothermic reaction is when something gives out heat when reacting with something else and endothermic is when you have to add heat to make something work.

  The rate of reaction depends on four things:

  • Concentration.
  • Temperature.
  • Catalyst.
  • Size of particles.

Predictions

I think that if I change the concentration of the NaOH, there will be more heat produced when mixed with HCL and water

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  I think that if there are more NaOH particles in mixing with the HCL particles more collisions will happen and more heat will be produce. I also think that the more H2O I add the less heat will be produced, as this will reduce the concentration of NaOH and HCL.

Variables

Independent: I am going to change to concentration of HCL and the volume of water I am adding each time.

Dependant: I am going to measure the heat produced before, during and after I mix the HCL, NaOH and the H2O.

Controlled: I am going to ...

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