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FinnZ [79.3K]
3 years ago
11

The ph of lemon juice is approximately 2.4. at this ph, the hydronium ion concentration is closest to which value? 1. 250 m 2. 4

.00 × 10−3 m 3. 2.50 × 10−12 m 4. 5.62 × 10−4 m
Chemistry
2 answers:
babymother [125]3 years ago
8 0

Answer is: concentration of hydrogen cations in lemon juice is 4.00 × 10−3 m.

pH = 2.4.

pH = -log[H₃O+].

[H₃O+] = 10∧(-pH).

[H₃O+] = 10∧(-2.4).

[H₃O+] = 0.004 mol/L.

pH value (potential of hydrogen - [H+]) is a logarithmic scale that specify the acidity or basicity of an aqueous solution. When pH is greater than seven, aqueous solution is basic, below seven is acidic and when pH is equal seven, solution is neutral.
choli [55]3 years ago
6 0

Answer : The correct option is, (2) 4.00\times 10^{-3}M

Explanation:

pH : It is defined as the negative logarithm of hydrogen ion or hydronium ion concentration.

The mathematical expression is :

pH=-\log [H^+]

or,

pH=-\log [H_3O^+]

Now we have to calculate the H_3O^+ concentration.

pH=-\log [H_3O^+]

2.4=-\log [H_3O^+]

[H_3O^+]=3.98\times 10^{-3}M\approx 4.00\times 10^{-3}M

Therefore, the H_3O^+ concentration is, 4.00\times 10^{-3}M

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