Acids and Bases

According to the pH scale, which item is a stronger base than soap?

• baking soda

• ammonia solution

• tomato

• bleach

According to the pH scale, which item is more acidic than lemons?

• battery

• vinegar

• milk

• blood

Bases will turn litmus paper __________, while acids will turn litmus paper __________.

• blue.....red
• red.....blue
• pink.........colourless
• colourless..........pink

Examine the results (color change) of the pH paper shown in the picture.  What type of substance was tested?

• an acid
• a base
• a neutral substance
• none of the above

A sour taste is a characteristic of:

• acids

• bases

• neutral

• pH scale

Which is a characteristic of a base?

• tastes sour

• found mostly in foods

• feels slippery

• turn litmus paper red

pH is the measure of the concentration of ______.

• Acids

• H+ ion

• OH- ion

• Bases

NaOH is:

• a base

• an acid

• neither an acid nor a base

• both an acid and a base

If a solution is basic which ion will be more present?

• H+
• K+
• OH-
• H-

CsOH is classified as a:

• acid

• base