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ElenaW [278]
2 years ago
15

A stone weighs 105 lb in air. When submerged in water, it weighs 67.0 lb. Find the volume and specific gravity of the stone.

Chemistry
1 answer:
OlgaM077 [116]2 years ago
6 0
Don’t knowwwwwwwwwww?
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CO2 dissolves in water to form carbonic acid: H2CO3 <---> H+ + HCO3-Ka1 = 4.3 x l0^-7 HCO3- <---> H+ + CO3-2 Ka2 = 4
Alisiya [41]

Answer:

Ratio of [CO₃²⁻] / [H₂CO₃] is 1.0x10⁻⁸

Explanation:

Based on the equilibriums:

H₂CO₃ ⇄ H⁺ + HCO₃⁻ Ka1 = 4.3x10⁻⁷

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The sum of both equilibriums is:

H₂CO₃ ⇄ 2 H⁺ + CO₃²⁻ K' = 4.3x10⁻⁷*4.8x10⁻¹¹ = 2.064x10⁻¹⁷

Where K' is defined as:

K' = 2.064x10⁻¹⁷ = [H⁺]² [CO₃²⁻] / [H₂CO₃]

If concentration of H⁺ is 4.5x10⁻⁵M:

K' = 2.064x10⁻¹⁷ = [4.5x10⁻⁵]² [CO₃²⁻] / [H₂CO₃]

1.0x10⁻⁸ = [CO₃²⁻] / [H₂CO₃]

Thus, <em>ratio of [CO₃²⁻] / [H₂CO₃] is 1.0x10⁻⁸</em>

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Answer:

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