b) What would you see when this reaction is taking place? (State any two observations).
Answers
Answer:
You count the amount of bubbles that ascend to the top of the solution. Here you can measure the amount of carbon dioxide bubbles that ascend to the surface per minute.
b) A brisk effervescence or bubbling of carbon dioxide gas is noticed, this gas extinguishes a burning splinter, turns moist blue litmus red, limewater milky but shows no change with acidified orange K2Cr2O7 solution.
The water level decreases constantly as downward displacement of water takes place as the gas is collected, bubbles of carbon dioxide are seen in the water column in the measuring cylinder.
This setup can be used to estimate the rate of the reaction by measuring and plotting the rate at which the water level in the measuring cylinder reduced and also to find out the volume of Carbon dioxide that was produced from that mass of calcium carbonate.