Hi, I just started year 12.
I had done a titration at school I used 2.10g of sodium hydrogen-carbonate and used 250ml of the sodium hydrogen-carbonate and water solution.
of 30.45I got an average titration of 30.45
Could you answer the questions I dont understand (2, and 4), and can you check some of my answers
1.The balance has a maximum of uncertainty of +- 0.005g in each reading. Calculate the percentage uncertainty in your mass of sodium hydrogen carbonate.
my answer: Would this be (0.005/2.10)x100 = +-0.2%
2. Explain why hydrated sodium carbonate and sodium hydroxide are not appropraite bases for making up a standard solution
3. The burette has a maximum uncertainty of +-0.05 cm^3 in each reading. Calculate the percentage uncertainty in your first accurate titre. (my first accurate titre was 30.40cm^3)
my answer: (0.05/30.40)x100 = +- 0.2%
4. The volumetric flask has a maximum uncertainty of +-0.3cm^3 and the pipette has a maximum uncertainty of +-0.04cm^3. Which of these gives the larger percentage uncertainty .
Thank you!!