Acid Base Chemistry and Le Chatlier Principle

What does pH measure in a substance?

• Concentration of hydronium ions

• Concentration of hydroxide ions

• Concentration of water molecules

• Concentration of acid molecules

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Remembering

Explain how the pH scale changes when a substance becomes more acidic or more basic.

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Analyzing

The equilibrium constant for the reaction H₂O + H₂O ⇌ [H₃O]⁺ + [OH]⁻ is 1.0 x 10^-14, meaning that the (forward or reverse) __________ reaction is favored?

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Remembering

Which of the following statements is true about pure water?

• It has equal concentrations of hydronium and hydroxide ions.

• It has a higher concentration of hydronium ions.

• It has a higher concentration of hydroxide ions.

• It has no ions present.

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Applying

Discuss the relationship between the pH value and the concentration of [H₃O⁺] ions.

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Analyzing

At pH 6, there are ___ times more [H₃O⁺] ions compared to pH 7.

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Applying

What is the primary component of oyster shells?

• Calcium carbonate

• Magnesium carbonate

• Calcium phosphate

• Protein matrix

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Understanding

Explain how ocean acidification impacts the ability of oysters to form shells.

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Analyzing

Eggshells and oyster shells are primarily composed of ___ carbonate.

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Understanding

What was the observed effect of the acid bath on the egg shell during the lab experiment?

• The shell dissolved and softened

• The shell became harder

• The shell remained unchanged

• The shell expanded

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Understanding