Реферат: Sodium Thiosulphate Essay Research Paper In this
Название: Sodium Thiosulphate Essay Research Paper In this Раздел: Топики по английскому языку Тип: реферат |
Sodium Thiosulphate Essay, Research Paper In this investigation I will change the concentration of the sodium thiosulphate by adding water in each case to make it more dilute but when adding the water it must bring the volume up to 10cm? everytime to make it a fair test.?????????????????????????? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Dependant variable.????????????????????????????????????????????????????????????????????????????? I will measure the time taken for the cross to disappear,as it will show whether the rate of reaction has increased or decreased. The rate of reaction has increased if the time has decreased as the reaction has occurred alot quicker so therefore the time taken is alot less.The rate of reaction has decreased if the time has increased as the reaction is alot slower and therefore the time taken is alot longer.??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Controlled variables.???????????????????????????????????? ?????????????????????????????????????I will keep: the same volume of hydrochloric acid.???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????the same reaction volume(total volume 20 cm ).????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ???????????????????????????????????????????????????????the same size of the cross.????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????the same size conical flask.????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????the same amount of swirling of the solution.?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????also the same peron will be timing the stopwatch.?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????and the same person will be judging how long it takes?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????for the cross to become invisible.????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ????The controlled variables are to make the experiment a fair test.??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? Note:The total volume is always the same,water must be added??? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????to the solution to bring it up to 20 cm .????????????? ????????????????????????????????????????????????? |