When sulphuric acid is added to the sludge, the iodine ions are oxidised: 2I‾ (s) + 3H2SO4 (l) à I2 + 2H2O (l) + SO2 (g) + 2HSO4‾ (s) 8I‾ (s) + 4H+ (aq) + 5H2SO4 (l) à H2S (g) + 4HSO4‾ (s) 4I2 (g) + 4H2O (l) As newer processes were developed they replaced the older methods as they were quicker, more efficient and sometimes cheaper. Graph 1 on the following page shows the annual production of chlorine, sodium hydroxide, hydrogen and iodine in tonnes per annum . This graph shows that the production of chlorine, sodium hydroxide and hydrogen are co...

• Word Count: 1092
• Approx Pages: 4
• Grade Level: High School

Once I had done the graph I realised that I had a few results were anolomisys. The shape of my graph was going up fast at first then it slowed down. Here are a few points about rates of reaction: Rates of reaction I will be comparing rates of reaction for1 minuet on my graph. The 1 minuet I will be comparing will be from 4mins -5mins. 4 Mins 39/240= 0.1625 CM3/s 4Mins20Secs 43/260= 0.1653846 Cm3/s 4Mins40Secs 47/280= 0.1678571 Cm3/s Evaluation I think my method was a suitable one although I think I could have added more Marble chips to make the rate of reaction a littl...

• Word Count: 888
• Approx Pages: 4
• Grade Level: High School