This widget finds the pH of an acid from its pKa value and concentration. Harold Hammer. I get sick alot so I have alot of math homework. Doing math equations is a great way to keep your mind sharp and improve your problem-solving skills. All tip submissions are carefully reviewed before being published. It is used in everyday life, from counting to measuring to more complex calculations. For example log_(10)100 = 2, and log_(10)1000 = 3. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Alternatively, it can be used to find the pOH value of a base by inputting its pKb value in the "pKa=" input field. Example 1. pKa of an acid is 4.75 and 0.1 concentrated in a solution. Use the relationships pK = log K and K = 10pK (Equation 16.5.11 and Equation 16.5.13) to convert between K_a and pK_a or K_b and pK_b. Acid Base pH and pKa Calculations in MCAT Chemistry - Leah4sci Till i found this. We can convert pKa to Ka as. Because Ka produces extremely wide-ranging values, pKa (pKa{\displaystyle pK_{a}})the negative logarithm (base 10) of Kais often used to simplify the range of acid strength values. Best calculator, but other than that. Video 7 - pH/pOH [H+]/[OH-] Wheel . Whether you need help solving quadratic equations, inspiration for the upcoming science fair or the latest update on a major storm, Sciencing is here to help. http://leah4sci.com/MCAT Presents: MCAT Math Without A Calculator Video 9 - Solving MCAT antilog calculations without a calculatorWatch Next: Logarithms an. To create a more manageable number, chemists created the pKa value: A strong acid with a dissociation constant of 107 has a pKa of -7, while a weak acid with a dissociation constant of 10-12 has a pKa of 12. % of people told us that this article helped them. For maintaining the precise and accurate pH of the buffer solution follow the steps Input: Select the buffer type Enter the pKa Enter Acid or base concentration Enter Relative salt concentration The mathematical operation you perform is Ka = antilog (-pKa). Can I find Ka (or pKa) without a calculator? This will give you your answer. Couldn't done my homeworks without it! How do you calculate Ka from pKa? pK_a = -log_10K_a. log7 is 0.84, so it's 7 - 0.84 or 6.16.
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