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Catalyst for Sodium Thiosulphate & Hydrochloric Acid?

Hey,
Doing some last minute chemistry coursework here...and I have no idea what catalyst I could use for the reaction between sodium thiosulphate & hydrochloric acid.
Help is much appreciated.
Thanks.
Reply 1
Are you sure you need to use a catalyst and not just change the concentration?
I'm with Zygroth here, no catalyst required, your CW will be to study the kinetics of that given reaction