|
The core of a pencil contains ____ (made of carbon not lead).
|
calcium
|
|
Sodium ____ is added to toothpaste to harden tooth enamel.
|
carbonic acid
|
|
Milk (pH 6.7) is slightly acidic because it contains ____.
|
fluoride
|
|
Mixing HCl and NaOH produces ____ (table salt) and water.
|
graphite
|
|
Hard water contains ____ and magnesium ions.
|
lactic acid
|
|
The electrolyte in a car battery is ____.
|
NaCl
|
|
Iron can oxidize to iron oxide, which is also known as ____.
|
rust
|
|
The fizz in soft drinks is produced by adding ____.
|
sulfuric acid
|
