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# Uncertainty Calculations For Equipment Watch

1. Hi, I'm doing OCR Salters coursework and was just wondering how I calculate this. When it says "amount measued" in this equation what does it mean by this?

(Uncertainty (Burette 0.05cm3) / Amount Measured) x100

Is it all of my mixture with all my solutions mixed in, or just the specific solution that was in one of my burettes? I have no brain in Chemistry.

Thanks
2. (Original post by imsobored.)
Hi, I'm doing OCR Salters coursework and was just wondering how I calculate this. When it says "amount measued" in this equation what does it mean by this?

(Uncertainty (Burette 0.05cm3) / Amount Measured) x100

Is it all of my mixture with all my solutions mixed in, or just the specific solution that was in one of my burettes? I have no brain in Chemistry.

Thanks
If you add 21.5 ml from the burette that's the 'amount measured'
3. (Original post by charco)
If you add 21.5 ml from the burette that's the 'amount measured'
Okay thanks! I'm meant to be putting in my lowest and highest measurement, so if I work out (5cm3 / 0.05cm3) x 100 = 100% ... That can't be right for my highest amount, can it?
4. (Original post by imsobored.)
Okay thanks! I'm meant to be putting in my lowest and highest measurement, so if I work out (5cm3 / 0.05cm3) x 100 = 100% ... That can't be right for my highest amount, can it?
no, read my first post again...

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