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# Q=mcΔT watch

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1. Im awful at Chemistry and I have this question to do with aqueous KOH and HCL. Which do I calculate the mass for in the q=mcdeltaT equation?
2. Use the mass of the water (as it is that you are measuring the temperature of).
3. there is no water. It is adding KOH to HCL
4. (Original post by SrtaSierra)
aqueous KOH and HCL
But you said there was
5. (Original post by SrtaSierra)
there is no water. It is adding KOH to HCL
KOH and HCL are aqueous solutions. I.e dissolved in water. So it is the mass of the volume of the comined solutions.
6. are they not in aqueous solution?
7. You make the assumption that mass of the solid doesn't contribute to the mass of the water. For simplicity, therefore as density of water is 1 g/cm^3, so whatever volume of the combined solutions of KOH and HCl, that would be the mass of water(based on initial assumption), hence that is the mass you should use.

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