chemical analysis 0.0 / 5 ? Chemistrychemical analysisGCSEAQA Created by: justiceddCreated on: 03-02-23 19:27 what is a pure substance a substance with only one type of element or compound 1 of 17 chemically pure substance will melt or boil at a ....... specific temperature 2 of 17 how can you test the purity of a substance by measuring its boiling and melting point and comparing it with the boiling and melting point of the pure substance 3 of 17 what will impurities in a substance do to the melting point decreases it 4 of 17 what will impurities in a substance do to the boiling point increase it 5 of 17 what are formulations useful mixtures with a precise purpose that are made using a formula 6 of 17 examples of formulation pigment(adds colour to paint) cleaning products food and drinks 7 of 17 how are formulations useful in medicine by altering the formulation of a pill, you can make sure the pill is delivered to the correct part of the body, with the correct concentration. 8 of 17 test for chlorine put damp litmus paper in a test tube , if litmus paper turn white chlorine is present 9 of 17 test for hydrogen put a burning splint near a test tube, if you hear a squeaky bop hydrogen is present 10 of 17 test for oxygen put a glowing splint inside a test tube , if splint relights oxygen is present 11 of 17 carbon dioxide bubble carbon dioxide in limewater, if it is carbon dioxide the limewater will turn cloudy 12 of 17 what two phases does chromatography go through mobile phase stationary phase 13 of 17 what is the use of chromatography used to separate substances in a mixture 14 of 17 how many spots will pure substances form in a solvent 1 15 of 17 impure substances will form multiple spots in a solvent true or false true 16 of 17 memorise this formula Rf- distance travelled by substance divided by distance travelled by solvent 17 of 17
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