EXP. 1-2

common laboratory operations

common laboratory operations

title for exp. no. 1

measure, transfer, bunsen, heat, pcp, filter, decant, evap

8 operations for exp. 1

2,5,10 ml, lower

how many ml was used in measuring/estimating liquids, and what meniscus

10ml-half, 5ml-1/4, 2ml-1/10

results for the measuring liquids

3/4

how much water was filled in the beaker in transferring liquids

45degree

in heating liquids in test tube, what is the angle be

1ml fecl3 and 4ml naoh

in precipitation what are the reagents used

precipitate

solid formed by the reaction between 2 solutions

reddish brown ppt, Fe(OH)3 ferric hydroxide

result of the exp. 1 precipitation

filtrate

liquid that passes thru the filter paper

NaCl sol and Fe(OH)3

what was the filtrate and solid residue in exp. 1 during filtration

decantation

separating a liquid from a solid

5ml

how many ml of water was added in decantation ppt

supernatant liquid

liquid free of precipitate

5ml NaCl sol

reagent used in evaporation

residue(nacl crystals)

solid formed from evaporation

solutions, acids, bases

exp 2 title

iodine, sand, salt, sugar, 20ml

in exp 2: what were the substances used in testing solubility of solids in liquids, and ml of water

iodine-ss, sand-in, salt-s, sugar-s

results for the solubility of solids in liquids

1ml CHCl3

what was added in the iodine

1ml ethanol and water

what are the reagents used in testing for solubility of liquids in liquids 1st part

glycerin, oil, water

what are the reagents used in testing for solubility of liquids in liquids 2nd part

miscible

result of glycerin & water

sodium thiosulfate crystal and 1ml water

in exp 2. test for degree of saturation what is the reagent used

unsaturated solution

An - contains less solute than the solution is capable of dissolving.

saturated solution

is a solution that contains the maximum amount of solute that is capable of dissolving.

supersaturated solution

a solution that contains more solute than the solvent is capable of dissolving.

10 ml water, solid NaOH(exo) , solid NH4Cl(endo)

in endo and exo reaction what are the reagents used and results

1ml acetic acid, hydrochloric acid, ammonium hydroxide, sodium hydroxide

in exp 2 properties of acids and bases what are the regeants used

red-red, blue-red

acids turn red litmus paper and blue to

red-blue, blue-blue

bases turn red litmus paper and blue to

methyl orange, phenolphthalein

indicator to test for acids and bases

aluminum shaving-H2, marble chips-CO2

in exp. 2 what was the reagent used in testing relative activity of acids and gas evolved

1ml ferric chloride, aluminum sulfate, zinc nitrate and dilute NaOH sol

in exp. 2 relative activity of bases what are the reagents used

Fe(OH)3-reddish brown, Al(OH)3- white, Zn(OH)2-white

results ppt for the relative activity of bases