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Alla [95]
3 years ago
13

Fill in the blank to complete each statement about measuring an earthquake's magnitude.

Chemistry
2 answers:
ahrayia [7]3 years ago
6 0

Richter & Moment

I just did it :)

Vilka [71]3 years ago
3 0

Answer: Richter & Moment

Explanation: already did it

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3 years ago
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What is the ratio of lactic acid (Ka = 1.37x^10-4) to lactate in a solution with pH =4.29
hram777 [196]

Henderson–Hasselbalch equation is given as,

                                         pH  =  pKa  +  log [A⁻] / [HA]   -------- (1)

Solution:

Convert Ka into pKa,

                                         pKa  =  -log Ka

                                         pKa  =  -log 1.37 × 10⁻⁴

                                         pKa  =  3.863

Putting value of pKa and pH in eq.1,

                                         4.29  =  3.863 + log [lactate] / [lactic acid]

Or,

                   log [lactate] / [lactic acid]  =  4.29 - 3.863

                   log [lactate] / [lactic acid]  =  0.427

Taking Anti log,

                             [lactate] / [lactic acid]  =  2.673

Result:

           2.673 M  lactate salt when mixed with 1 M Lactic acid produces a buffer of pH = 4.29.

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Chem help 36 and 37 the word cut off on 37 is larger​
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The solution for problem 36 is in the picture attached. I am 80% sure it’s correct.

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