WebFeb 2, 2024 · A very simple, but very effective, way of measuring the time taken for a small fixed amount of precipitate to form is to stand the flask on a piece of paper with a cross drawn on it, and then look down through the solution until the cross disappears. A known volume of sodium thiosulphate solution is placed in a flask. WebJul 7, 2024 · Sodium thiosulfate disappearing cross experiment This video from Malmesbury Education demonstrates the precipitate-forming reaction between sodium thiosulfate and hydrochloric acid. Mrs Peers Dent draws a pencil cross on a piece of paper and …
Disappearing Cross Experiment - YouTube
WebApr 16, 2010 · the disappearing cross method is a method used when observing how the concentration of a chemical affects the rate of reaction. How do you find the length of a prism with the cross-section... WebDraw a cross on a piece of scrap paper and put it underneath the 100 cm 3 measuring cylinder so it can be seen when looking down the cylinder from the top. Using the 100 cm 3 measuring cylinder, measure 50 cm 3 of sodium thiosulfate solution. Place the cylinder back on top of the cross. highly transmissible covid
Concentration and rates of reaction - "Disappearing cross" experiment …
WebDec 11, 2024 · The disappearing cross Essay In this experiment, we shall be adding sodium thiosulphate to hydrochloric acid together and placing a drawn cross underneath and seeing how long the rate of reaction lasts until you cannot see this cross. Before the reaction starts, the liquids are both clear. WebApr 27, 2024 · In the CSEC/GCE experiment, we look at how changing the concentration of a reactant (sodium thiosulphate) affects the rate of a chemical reaction between sodium thiosulphate and sulphuric acid.... WebPP141 - The thiosulfate-acid reaction: rate and temperature Various monitoring techniques can be used to investigate how different factors affect the rates of reactions. The thiosulfate-acid ‘disappearing cross’ activity is an example of a clock reaction with .. more words matched: cross, disappearing highly transient