The ph value

THE PH VALUE & THE ELECTRICAL CONDUCTIVITY OF A SOLUTION JOOYEON PARK AIM To know how to check the PH value of a resolve and to see the relationship amid the PH value and the electric conductivity. MATERIALS Universal indicator, litmus experiment, phenolphthalein, water system, 6 beakers, wires, softly bulbs, test undergrounds, metal conductors, solutions of: Ba(OH)2, NaOH, Na2CO3, CuSO4, H2SO4, CH3COOH, NH3*H2O METHOD swan a deteriorate of each solution and water on universal indicators. because use the colourize to find out the pH set of the solutions. After that, put a little fare of Ba(OH)2 and H2SO4 into antithetic test tubes (two test tubes of Ba(OH)2 and two test tubes of H2SO4). tooshie drops of litmus to two test tubes (one test tube of Ba(OH)2 and another(prenominal) of H2SO4), and emerge drops of phenolphthalein (one test tube of Ba(OH)2 and another of H2SO4), and see the intensify of color of two unlike indicators in two different solutions. a ccordingly effuse CH3COOH and place couple drops of NaOH into a test tube and mix them. Check whether it resists the change of the pH set. therefore pour pure water and the solutions of H2SO4, Ba(OH)2, CH3COOH, NH3*H2O into the beakers (each solution in a beaker). And place a metal conductor in the beakers with solutions and relate it to the wires that are connected to 5 different well-situated bulbs.

When connected, plait on the power and compare the brightness of the light bulbs connected to different solutions. Then try this again with the change of Ba(OH)2 and H2SO4. ANALYSIS For the values of pH, we got Ba(OH)2=13, NaOH=12, Na2CO3=12, CuSO4=3! , H2SO4=1, CH3COOH=4, NH3*H2O=11 and pure water=7. The color of litmus changed to red when it met H2SO4 and changed to blue when it met Ba(OH)2. There was no color when phenolphthalein was dropped... If you lack to get a full essay, recount it on our website: BestEssayCheap.com

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