Analysis of Brick Cleaner Essay

Aim To find the piece by jalopy of hydrochloric acid hold in brick unsullied by doing an acid-base titration.possibility/Hypothesis The main ingredient in brick antiseptic is HCL and must be thin and titrated with a base to be adequate to analyse it. It reacts with parts of the concrete which allows it to unsay the concrete from the bricks. I think in that respect will be around 30% of HCL in brick immaculate.Materials* 5mL brick spotless* 100mL, 0.1M patronizeard atomic number 11 carbonate response* 250ml de-ionised urine* methyl radical chromatic indicator* 250mL volumetrical flaskfulful* 4x100mL conical flasks* Small funnel* 10mL touchstone cylinder* 20mL pipette* Pipette dawn* Dropping pipette* Burette and stand* White tile* Electronic match* Safety glasses* GlovesMethod1) A 250 mL volumetric flask was weighed with its mass recorded2) A 10mL measurement cylinder was utilise to pour 5mL brick cleansing agent into the volumetric flask. The flask was secu re refined after all the brick spick-and-span was in the flask.3) The flask was then reweighed4) De-ionised water was added until the flask was about half full. The flask was stoppered and shaken carefully upside spate several times.5) More water was added to the flask about a cm on a lower floor the graduation line. A dropper was used to accurately drop the right measuring rod of water to the flask so the after part of the meniscus was on the graduation line.6) A 20mL pipette was used to put 20mL of atomic number 11 carbonate settlement into each of the intravenous feeding 100mL conical flask. 3 drops of methyl orange indicator was added to each.7) The burette was filled with the solution of brick cleaner.8) The atomic number 11 carbonate solution was titrated with the solution of brick cleaner until at that place was a go through permanent colour change.9) Steps 7 and 8 were repeated until 3 amenable go forths wereResultsWeightVolumetric flask78.968gBrick cleaner6.00g Titre123Initial vol2.323.43.0Final vol23.444.524.0Vol added21.121.121.0CalculationsOn page attached.DiscussionThe weight for the brick cleaner whitethorn non be 6.00g as the volumetric flask was not weighed again with the brick cleaner in it because that step was forgotten. So the result above was taken from an opposite school-age child that did the prac. This will affect the results as the mass of the brick cleaner is used to determine the share by mass of HCL in brick cleaner. altogether 3 titres show that they are sole(prenominal) within 0.1 of each other. The hypothesis has been disproved because it was suggested the 30% of HCL would be in brick cleaner and thithers only 2.4% although its not certain that those steps were done justly. at that place were no problems encountered during this prac.Focus Questions8)a) the manufacturer says that brick cleaner is made up of around 35% HCL, which is a massive difference to the answer that was got in this prac but again apparent movement 7 was not done correctly.b) differences in class results occur because not everybody would turn out done the exact volume of brick cleaner, sodium carbonate etc as each other therefore the difference in results obtained.9) To correctly clean up a declination of 20mL brick cleaner you would mop it up immediately, washout it away with massive amounts of water10)a) volumetric flask= once with water in two ways with brick cleanerb) Burette= once with water twice with diluted solution of brick cleanerc) pipette= once with water twice with diluted brick cleanerd) conical flask=once with water twice with sodium carbonate solutionConclusion To conclude, there should be 35% HCL in brick cleaner although it was found that there was only 2.4%