Acid Base Indicators

What is the pH of the substance being tested?

• 2

• 4

• 6

• 8

A(n) ______ is a substance with a pH less than 7

• Acid

• Alkaline

• Base

• Buffer

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid

• cabbage

• milk

What is the colour of litmus in an acid ?

• Pink

• Yellow

• Red

• Colourless

Which indicator is blue in a solution that has a pH of 5.6?

• bromcresol green

• bromthymol blue

• thymol blue

• methyl orange

Which one of the following is an acid?

• NaOH

• NaCl

• HCl

• BaO

A student is studying a substance that tastes bitter and is slippery to touch. When phenolpthalein is added is turns magenta. What is the student most likely studying?

• water (neutral)

• lemon juice (acid)

• drain cleaner (base)

• salt solution (neutral)

a student measures the pH of a substance using pH paper. It turns a dark blue and is determined to have a pH of 13. Which of the following best describes this substance?

• strong base

• strong acid

• weak base

• weak acid

If an acid is combined with a base of equal strength, the result will most likely be

• neutral solution.

• stronger acid.

• impossible to tell without testing the pH.

• stronger base

Vinegar, fruit juice, and cola are examples of:

• salts

• neutral substances

• bases

• acids

Tags

NGSS.MS-PS1-2