Question

1. how is the top loading balances and the analytical balances varied in costruction?
2.why is it important to use the same balance throught the entire experiment?
3. why is the air mixed with gas in the barrel of the burner before the gas is burned?
4.how would you adjust aburner that has a yellow and smoky flame?
5. how would you adjust aburner that is noisy with a tendency to blow itself out?
6.why are glass rods always fire polished after cutting?
7.why is important to rotate the glass rod while heating?
plzz i need the answers

Answer 1

1. Top loading balances are less accurate built with no balancer in it when it comes to errors associated as compared to analytical balances which is built with a balancer on the other end.

2. To reduce the effect of error associated while measuring it is advised to use the same balance throughout the experiment.

3. The air is mixed for even distribution and better flame before the gas is burned.

4. The flame is adjusted by supplying more air to the flame to get a blue flame.

5. The flame is reduced to get a better flame in this case.

6. Glass rods are uneven initially and thus fire polished after cutting.

7. For even heating and polishing the rods are constantly rotated while heating on a fire.