Result of Observation Flame Test - 1152 Words

Result of Observation Chemical name and symbol Physical appearance Cation of the compound Flame color NaNO3Sodium nitrate Colourless crystal Na+ Yellowish Orange NaClSodium chloride Colorless crystal Cl+ Yellowish Orange LiNO3Lithium nitrate Colorless crystal Li+ Red BaNO3Barium nitrate White crystal Ba ² Bright yellow, lime yellow Sr(NO3) 2Strontium nitrate White crystal Sr ² Dark red Cu(NO3)2Cupric nitrate Blue crystal Cu ² Green, bluish green. Ca(NO3) 2Calcium nitrate White crystal Ca ² Redish orange KNO3Potassium nitrate Colourless crystal. K+ Light purple Unknown #1 Colorless crystal Red Unknown #2 White crystal Redish orange Unknown #1 is lithium nitrate, because it had the same physical appearance and same flame color as†¦show more content†¦Which means all metal have a different value. This explains when different metal are heated they emit light with different frequencies, which also mean different color. Conclusion During this lab we investigated the different flame colours produced by different compounds when electrons are excited by heating method, by doing this we were managed to identify two unknown compounds by comparing their flame colour to known ones. In this lab we used nichrome wire to pick up different compounds to burn in Bunsen burner to examine the different flame color, after each compounds, we cleaned the nichrome wire by rising it in hydrochloric acid and burning it until no colour other than the flames natural color was observed. By burning the compounds we excited the electrons to undergo transition, when they fall back to ground state, they emit light, and each element has different energy, which means they produce different colour of light. By looking at the results and observation, we saw that the flame color of sodium nitrate and sodium chloride was same, or almost identical. We figured out that it was the cation of the compound, which was responsible for the d ifferent colour we see, and not the anions in this experiment. Also by doing this we figured out the unknowns by comparing the flame color, the unknowns had the same colour as lithium nitrate and calcium nitrate, so I will assume the unknowns are lithium nitrate and calcium nitrate, but weShow MoreRelatedQualitative Observation Of A Chemical Reaction Lab Report1343 Words   |  6 PagesQualitative Observation of a Chemical Reaction Purpose: Carefully observe and interpret a chemical reaction. Apparatus: Equipment- 250mL beaker, 125mL Erlenmeyer flask, cardboard square, chemical scoop, metric ruler, lab countertop, rubber stoppers, safety goggles, lab apron Materials- candle ( 2cm diameter), matchbook, 2 toothpicks, Limewater solution, string, aluminum foil, Cobalt Chloride paper Procedure: Note appearance, odor, and feel of the unlighted candle. 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