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Presentation transcript:

WELCOME

Maharaja Sayajirao Vidyalaya, SATARA

Ms. Priya Vishwas waghambare. MSc.B.Ed.(Chemistry) A Presentation By Ms. Priya Vishwas waghambare. MSc.B.Ed.(Chemistry)

Laboratory preparation of Carbon dioxide Metals and Nonmetals Laboratory preparation of Carbon dioxide

Aim- To prepare and study the properties of carbon dioxide. Apparatus- Flat bottom flask, two holed rubber cork , thistle funnel, gas delivery tube, gas jar with lid ,stand candles, match box, test tubes, deflagrating spoon. Chemicals- Pieces of marble / shahabad stone , dil.Hydrochloric acid, blue and red litmus paper, freshly prepared lime water,magnesium ribbon.

Diagram-

Balanced chemical equation- CaCO3 + 2 HCl CaCl2 + H2O + CO2 Calcium Hydrochloric Calcium water Carbon Carbonate acid chloride dioxide

Observation and Inference – Sr.No. Test Observation Inference 1 Colour of the gas Colourless Co2 is colourless 2 Effect of gas on moist blue & red litmus paper Moist blue litmus paper turns red CO2 is acidic 3 Insert the lightened candle in gas jar with the help of deflagrating spoon Candle extinguished and gas doesn’t burn CO2 neither supports combustion not is combustible

Observation and Inference - Sr.No. Test Observation Inference 4 Effect of gas burning magnesium ribbon The burning of piece of magnesium ribbon continues to burn & black particles are formed Magnesium reduces CO2 at high temperature & black particles of carbon are formed 5 Effect of gas on fresh lime water ( for short time ) Lime water turns milky CaCO3 reacts with Ca (OH)2 & forms insoluble white CaCO3 6 Effect of gas on fresh lime water ( for long time ) Milky white lime water turns colourless CaCO3 turns colourless due to calcium bicarbonate

Exercise Complete the following chart Sr.No. Test Observation Inference 1 Colour of the gas 2 Effect of gas on moist blue & red litmus paper 5 Effect of gas on fresh lime water ( for short time )

Thank You