1) Choose the best answer. After adding the universal indicator to the sodium hydroxide solution, what was the new color?

	red
	yellow
	blue
	deep purple
	green

2) Choose the best answer. Is sodium hydroxide an acid or a base?

	base
	acid

3) Choose the best answer. What happened after the tablet was dropped into the solution?

	The solution turned yellow.
	The solution turned red.
	The solution turned green.
	The solution turned orange.
	The solution turned blue.

4) Choose the best answer. Does the tablet make the solution an acid, base, or neutral?

	acid
	neutral
	base

5) Choose the best answer. After adding the vinegar, what color appears at the top of the solution?

	orange
	red
	purple
	blue
	green

6) Choose the best answer. Is vinegar an acid or a base?

	acid
	base