'Significant figuresin' diaporamas de présentation

Entry task: Sept 28 th Friday

Entry task: Sept 28 th Friday. Question: Round the following to 2 significant figures: 256900 grams You have 5 minutes TURN IN ENTRY TASK SHEET!!. Agenda. Sign off & Discuss Sig Fig and Sci Notation Notes on MATH with Significant figures and Scientific notation. 5.87678 X 10 -3.

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pH problems

pH problems. pH equations. pOH = -log [OH - ] pH = -log [H + ] [H + ][ OH - ] = 1x10 -14 pH + pOH = 14 pOH is the reverse of pH Above 7 is acidic, below 7 is basic. Sig Figs and pH.

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In any solution the H 3 O + and OH - concentration is always very small.

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Sig Figs and pH

Sig Figs and pH. The number of decimal places in the log value, pH value, is equal to the number of significant figures in the number that we took the logarithm of, concentration. So [H 3 O + ] = 2.45 x10 -4 M 3 sig figs pH = -log 2.45 x10 -4 M = 3. 611 3 decimal places.

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