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Two questions about acid? help?

1. Which of the following statements is not true regarding acids?

Arrhenius acid is any substance that increases the concentration of hydronium ions.

Lewis acid is a substance that donates a lone-pair of electrons.

Brønsted-Lowry acid is any substance that donates a hydrogen ion.

The pH is less than 7.0.

2. Which of the following would decrease the pH level of an acidic solution?

increasing the number of hydrogen ions
increasing the concentration of hydroxide ions
adding a base to the acid
decrease the concentration of hydroniu

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taskmasters
For the first question, I think the correct answer among the choices listed is option B. Lewis acid is not a substance that donates a lone-pair of electrons rather it accepts lone-pair of electrons.

For the second question, the correct answer is the first option. Increasing the number of hydrogen ions will decrease the pH level making it more acidic.

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