Chemistry, 18.09.2019 18:10 kiki197701
Phosphoric acid is a triprotic acid with the pkapka values pka1=2.148pka1=2.148 , pka2=7.198 pka2=7.198 , and pka3=12.375 pka3=12.375 . you wish to prepare 1.000 l of a 0.06000.0600 m phosphate buffer at ph 7.6407.640 . to do this, you choose to mix the two salt forms involved in the second ionization, nah2po4nah2po4 and na2hpo4na2hpo4 , in a 1.000 l volumetric flask and add water to the mark. what mass of each salt will you add to the mixture?
Answers: 1
Chemistry, 22.06.2019 06:00, hdjsjfjruejchhehd
The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.
Answers: 1
Chemistry, 22.06.2019 13:50, amandamac7339
Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.
Answers: 1
Chemistry, 22.06.2019 18:30, robjaykay
The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of
Answers: 2
Phosphoric acid is a triprotic acid with the pkapka values pka1=2.148pka1=2.148 , pka2=7.198 pka2=7....
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