WorksheetsFundamentals of Chemistry, Acidity and Alkalinity
Total questions: 18
Worksheet time: 6mins
What are molecules?
Makes up all of matter
Is pure substance of everything that isn't matter
A molecule is a made up of same or different types of atoms
is a chemical formula
What is a compound ?
Same atoms are combined together
Different atom that are combined together
Single stable atom
Determine example of compound (You may choose more than 1 answer)
Oxygen gas, O2
Carbon dioxide, CO2
Nitrogen gas, N2
Sodium Hydroxide(NaOH)
What is a homogeneous mixture
A mixtures that are evenly mixed so you cannot see the different parts of mixture
A mixture where you can easily see the different parts of mixture
Mixture that form new chemical substance
What is a mixture?
Two or more substances are combined with a chemical reaction.
Mixture is when you digest food together
Two or more substances are physically mixed
What is an element?
A pure substance made up of two or more elements.
A pure substance made of one element represented by a chemical symbol
Different substance combine together
The meaning of suspension is:
A solution containing the maximum concentration of a solute.
Solid form due to chemical reaction occurs in a liquid solution.
The ability for a given substance, the solute, to dissolve in a solvent.
A mixture between a liquid and particles of a solid which are do not dissolve and its particles are dispersed throughout the liquid.
The meaning of precipitation is:
A mixture between a liquid and particles of a solid which are do not dissolve and its particles are dispersed throughout the liquid.
Solid form due to chemical reaction occurs in a liquid solution.
The ability for a given substance, the solute, to dissolve in a solvent.
A solution containing the maximum concentration of a solute.
“Homogenous mixture that contain solute and solvent” is refer to:
Solubility
Suspension
Solution
Saturation
What are chemical reactions?
Allows the cells function properly and maintain life.
Amount of an element that is at the end was at the beginning.
The amount of energy the organism uses.
Process that changes substances into new substances
In universal pH indicator, weak alkali are indicated through a pH scale of
4 to 7
8 to 10
10 to 14
7 to 14
Which of the following is the best indicator to determine acid and alkali solution
Litmus indicator
Universal pH indicator
Phenolphthalein indicators
Hydroxide ion give an acidic properties.
True
False
Acidity is
A substance that breaks into hydrogen ions, H+ in an aqueous solution.
A substance that breaks into hydroxide ion, OH- when dissolved in aqueous solution.
The capacity of a water sample to neutralize added alkali
The capacity of a water sample to neutralize added acid.
Alkalinity is
A substance that breaks into hydrogen ions, H+ in an aqueous solution.
A substance that breaks into hydroxide ion, OH- when dissolved in aqueous solution.
The capacity of a water sample to neutralize added alkali
The capacity of a water sample to neutralize added acid.
Choose 3 correct statement for ocean acidification:
Increasing of carbon dioxide emission
Increasing concentration of H+ in seawater
High number of pH value
Low number of pH value
Effect ocean acidification to marine biodiversity will reduce formation of calcium carbonate, CaCO3 needed by marine life. The reason CaCO3 difficult to form is:
High number of hydroxide ion tend to bind with carbonate ion to form bicarbonate ion.
Calcium ions tend to bind with hydrogen ion.
Less number of calcium ion in seawater
High number of hydrogen ion tend to bind with carbonate ion to form bicarbonate ion.
The effect of high pH value in boiler water can lead to
Acid attack to boiler tube and become corrode
Caustic attack and boiler tube become brittle.
Increases heat transfer efficiency
