In The Reaction Between

In the chemical reaction between sodium thiosulphate solution and subvert hydrochloric acid HCl + sodium thiosulphate sodium chloride + sulphur dioxide + sulphur + piddle. HCl(aq)   +  Na2S2O3(aq)            NaCl(aq)      +    SO2(g)      +      S(s) + H2O(l) plastered sulphur (S(s)) is organize in the flask. Increasing the concentration of sodium thiosulphate means that the solid sulphur exit be produced more than quickly and there give be less snip before the cross preserve no long-life be seen. The reaction is usually carried erupt in a flask placed on a piece of music of dust coat paper which has a black cross on it. At the beginning of the reaction, the cross can be seen easily. As the flask becomes more and more incomprehensible the cross gets harder to see. You can judge the time from the start of the reaction until the cross can no overnight be seen. This is a way of measuring rod the rove of administration o f sulphur. Changing the concentration 5 cm3 of HCl (1 mol./dm3), 40 cm3 of body of water and 10 cm3 of sodium thiosulphate are meterd tabu into three measuring cylinders and and so poured into a conical flask which is standing on covering of a laminated cross, drawn on a snow-covered paper. The timepiece starts immediately and when the mixture has turned sufficiently cloudy so that the letter X can no longer be seen the timer will be stopped.

The time will be recorded. The experiment is restate with the same concentration and semblance of acid. The volume of sodium thiosulphate starts from 10m ls and increases by 10mls while the volume o! f water begins with 40mls and decreases by 10mls3 after each testing. The whole procedure is because repeated and the time recorded to show how fast the reaction takes place. setup| | | | | | | | | | PROCEDUREUsing the 50mls plastic measuring cylinder measure out into the conical flask. * 10mls of sodium thiosulphate. * 40mls of water. Using the 10mls glass measuring cylinder measure out 5mls of dilute hydrochloric acid and put it into the test tube. | | | | |...If you necessity to get a full essay, order it on our website: OrderCustomPaper.com

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