8/19/2019 Stoichiometry of a Magnesium and Hydrochloric Acid Reaction

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Stoichiometry of a Magnesium and HydrochloricAcid Reaction

By

Lee Brandt

September 21, 201

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8/19/2019 Stoichiometry of a Magnesium and Hydrochloric Acid Reaction

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$b%ecti&e' (he ob%ecti&e of this e#periment )as to understand stoichiometry bystudying a reaction of metal and acid* (his e#periment e+ecti&ely taughtthree essential sills' (itration, deduction of balanced chemical e-uations,

and the )ater displacement method of measuring gas &olume*

.rocedure' (o begin the e#periment gather the follo)ing materials1 /alculator1 in* (est tube2 pieces of rubber tubing1 rubber stopper )ith one hole1 rubber stopper )ith t)o holes1 00 mL lorence as1 .inch clamp

1 300 mL beaer1 magnesium ribbon4*205*26g72 mL of standard H/l 4about 151*M7t)o beaer holderst)o glass tubes2 mL burett)o lab stands1 rotatable arm clamp.henolphthalein indicator (itration buret

Set up apparatus as sho)n in 8gure 1*

igure 1igure 1 is a picture of the set up of this e#periment*Start a siphon action bet)een the as and the beaer by gently blo)inginto the tubing that attaches to the test tube* (his process taes anybubbles out of the tubing and allo)s for one to test the &olume of gasproduced using the )ater displacement method*

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8/19/2019 Stoichiometry of a Magnesium and Hydrochloric Acid Reaction

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67 Add about 200 mL of )ater to the beaer and ad%ust the siphon so that theas is 8lled to the nec* /lose the pinch clamp*7 measure a length of magnesium ribbon using an electric balance to )eighbet)een *2g and *26g, then coil gently*37 meaure e#actly 2*mL of standard H/l solution into the test tube using a

2mL &olumetric pipet* Record the e#act molarity of the H/l solution*97 tip the test tube so that the solution slightly reaches %ust o&er half)ay upthe side*7placed the coiled magnesium ribbon o&er the glass tubing on the inside ofthe rubber stopper* :7 .lace the stopper in the test tube, being carful to eepthe magnesium ribbon on the glass tubuing*107 drain the beaer and open the pinch clamp*117 tip the magnesium into the H/l solution127 )ait for all the magnesium to react and remo&e the test tube from itsclamp and place it in a beaer of )ater to cool for 10min*1;7a$H used to reach end point*

207 using the directions in the lab pacet, do the calculations to 8nd theempirical formulate for the balanced chemical e-uation for the reaction

?ata and /alculations'

/onclusions'

Brandt ;