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Sagot :
log1.429V=3.20 volume (to the nearest 0. 1 ml) of 4. 70-m NaOH must be added to 0. 700 l of 0. 250-m HNO2 to prepare a ph = 3. 20 buffer
Solution ;
pH= pKa +log {[ NaOH ] / [ HNO2 ]}
3.20=3.80+log{(V×4.70)/ ( 0.700×0.250)}
3.20=log1.429V
Volume will be 3.20=log1.429V
To know more about preparation of Buffer preparation an calculation please click here : https://brainly.com/question/22390063
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