GCSEChemistry@Trinity

[GCSEChemistry@Trinity @chemistry_gcse]

Brackets make formula mass harder but just think of the brackets as being repeated. The numbers are subscripts but Twitter doesn't do them!?!

The Mr of (NH4)3PO4 is...

[GCSEChemistry@Trinity @chemistry_gcse]

What is the Mr (formula mass) of ZnCO3?

[GCSEChemistry@Trinity @chemistry_gcse]

What is the uncertainty in my mass if I am 73kg?

[GCSEChemistry@Trinity @chemistry_gcse]

Nanoparticles: what are they? What are the concerns about nanoparticles?

[GCSEChemistry@Trinity @chemistry_gcse]

Suncream is one example of the use of nanotechnology. Name the uses and materials used.

[GCSEChemistry@Trinity @chemistry_gcse]

Despite using suncream I still got burnt! How might nanoparticles have helped?

[GCSEChemistry@Trinity @chemistry_gcse]

Late night electrolysis! What are the anode and cathode products when molten silver chloride and aqueous silver nitrate are electrolyzed?

Challenge: what are the half equations for each electrode in each case?

[GCSEChemistry@Trinity @chemistry_gcse]

Titration Calculations: sort these steps into the correct order.

a) Calculate moles of unknown.
b) Calculate mean titre.
c) Calculate concentration of unknown.
d) Determine moles of unknown by ratio from balanced equation.
e) Select concordant titres.

[GCSEChemistry@Trinity @chemistry_gcse]

Identify me. Suggest an industrial use and state 2 key physical properties I have appropriate to that use.

[GCSEChemistry@Trinity @chemistry_gcse]

Structure and Bonding Who Am I. Use the properties to identify the substance.

I have a high melting point.
I don't conduct electricity as a solid.
I do conduct electricity as a liquid.

[GCSEChemistry@Trinity @chemistry_gcse]

Complete the energy profile diagram. Is it Exo- or Endo-thermic? Will the reaction get hotter or colder?

[GCSEChemistry@Trinity @chemistry_gcse]

What might this apparatus be used for?
What are the 8 key steps in the process?

[GCSEChemistry@Trinity @chemistry_gcse]

Y10 - Why is cryolite used in the extraction of aluminium?