Which gas is used in the Haber process to manufacture ammonia and fertilizers?
nitrogen
Which gas fills bags of chips and snacks to make sure the food doesn't go rancid from exposure to oxygen?
nitrogen
The atmosphere is 78% nitrogen and 21% oxygen. Name the next three most common gases.
argon (.9%) carbon dioxide (.04%) neon (.002%)...water vapor also OK (0%-3%)
What do you call a base that is soluble in water?
an alkali
How can we summarize a neutralization reaction?
acid + base -> salt + water
What kind of reaction occurs when an acid is mixed with a base?
a neutralization reaction
Each plant grows best in certain pH soils. Which prefers more acidic soil, potatoes or onion?
potatoes (prefer 4.5-6.0, whereas onions prefer 6.0-7.5)
How can excessively acidic soil be dealt with?
It can be neutralized with lime (calcium oxide, calcium hydroxide, calcium carbonate=limestone, or chalk).
How can excessively alkaline soil be handled?
Add peat, compost or manure
Name one of the substances commonly referred to as "lime".
calcium oxide, calcium hydroxide, calcium carbonate=limestone, or chalk
Why are these hydrangea flowers different colors?
Each one is a pH indicator.
Why might someone swallow the insoluble magnesium hydroxide?
It is an antacid.
What do ALL metal oxides and hydroxides do?
They all neutralize acids, whether soluble or not. They are bases.
Most bases are insoluble in water. Name a common alkali, a base that IS soluble.
sodium hydroxide, potassium hydroxide, calcium hydroxide (limewater), ammonia (ammonium hydroxide)
Which letter is bases and which letter is alkalis?
A is alkalis. B is bases.
What is NaOH?
sodium hydroxide (lye)
