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Choose the most acidic substance in the group.

lemon juice, pH = 2.25

orange juice, pH = 3.75

milk, pH = 6.6

seawater, pH = 8

Respuesta :

It would be lemon juice since it has the lowest pH

Answer: lemon juice, pH = 2.25

Explanation:

pH is the measure of acidity or alkalinity of a solution.

Acids are the substances which dissociate in water to give [tex]H^+[/tex] ions. Acids have pH raging from 1 to 6.9

[tex]HX\rightarrow H^++X^-[/tex]

pH is calculated by taking negative logarithm of hydrogen ion concentration.

[tex]pH=-\log [H^+][/tex]

Thus as pH and [tex]H^+[/tex] are inversely related, a solution having lower pH will have more amount of [tex]H^+[/tex] concentration and thus would be more acidic.

Thus lemon juice with lowest pH of 2.25 will have highest concentration of hydrogen ions and is most acidic.

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