# Acids and Bases Question

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- [math]"H"_3"PO"_4[/math]
- NaOH
- [math]"H"_2"O"[/math]
- [math]"CO"_2[/math]

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Type: *Multiple-Choice*

Category: *Acids and Bases*

Level: *Grade 10*

Author: *teachchemistry*

Last Modified: *2 months ago*

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Which of the following substances, when dissolved in water, increases the concentration of hydroxide ions?

- [math]"H"_3"PO"_4[/math]
- NaOH
- [math]"H"_2"O"[/math]
- [math]"CO"_2[/math]

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