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The ph value
Title: The ph value
Category: Literature
Details: Words: 575 | Pages: 2.4 (approximately 235 words/page)
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 solution and to see the relationship between the PH value and the electrical conductivity.
MATERIALS
Universal indicator, litmus, phenolphthalein, water, 6 beakers, wires, light bulbs, test tubes, metal conductors, solutions of: Ba(OH)2, NaOH, Na2CO3, CuSO4, H2SO4, CH3COOH, NH3*H2O
METHOD
Place a drop of each solution and water on universal indicators. Then use the color to find …showed first 85 words of 575 total…
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…showed last 85 words of 575 total…when meets base. On the other hand, the color of phenolphthalein is transparent when meets acid when it changes red when meets base. The buffer solution could be created by a mixture of a weak acid and a bit of strong base. Through the brightness of the light bulbs, we can see that the electrical conductivity is higher for the stronger acid and stronger base and is lower for the weaker acid and weaker base and pure water, whose pH values are closer to seven.
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