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WorksheetsWater Chemistry
Total questions: 23
Worksheet time: 14mins
Which property allows solid ice to float in liquid water?
Density
High specific heat
High boiling point
Adhesion
When the temperature on Earth drops abruptly, the land cools down faster than the sea.
Which property of water allows water to be resistant to sudden temperature changes?
Density
Adhesion
High specific heat capacity
Surface tension
Water is often referred to as a universal solvent because it can dissolve many substances.
What property of water makes it such a good solvent?
Acidity
Polarity
Lower density as liquid
Low specific heat
The scale below shows the pH levels of various liquids.
Which of the following substances is a weak acid?
Baking soda
Bleach
Lemon Juice
Soda
As liquid water becomes ice, the space between water molecules increases.
Which property of water does this change describe?
Water has a high boiling point
Water has a high specific heat capacity.
Water molecules have adhesive properties.
Water is less dense as a solid than a liquid.
A new dish soap claims that it is able to remove grease from pots and pans while still fully dissolving in the dishwasher water.
Which of the following best explains the ideal structure of the dish soap molecule?
The dish soap molecule must be polar at one end to dissolve grease, and nonpolar at the other end so it can dissolve in water.
The dish soap molecule must be nonpolar so that it can dissolve in both grease and water.
The dish soap molecule must be polar so that it can dissolve both grease and water.
The dish soap molecule must be nonpolar at one end to dissolve grease, and polar at the other end so it can dissolve in water.
Water has a boiling point of 100.0∘C, which is unusually high compared to many other liquids.
Which of the following properties allows water to have a high boiling point?
It contains only three atoms.
It is a small, covalent molecule.
It contains oxygen.
It can form hydrogen bonds.
Which statement best describes why water is an effective solvent?
Water’s relatively small size allows it to fit between individual atoms, driving them apart.
Water’s hydrophobic nature separates polar and non-polar substances.
Water’s polarity allows it to dissolve ionic and polar compounds.
Water is an ionic compound that attracts other like molecules.
A biologist develops a simulation of the carbon cycle in a laboratory by setting up a closed ecosystem. The ecosystem consists of a glass container with an Earth-like atmosphere and a body of freshwater. In the water are a fish and an aquatic plant. The container is kept in well-lit and temperature controlled conditions.
Which of the following best explains how the the fish influences the carbon level in the atmosphere?
It increases the carbon dioxide levels through photosynthesis.
It increases the carbon dioxide levels through cellular respiration.
It decreases the carbon dioxide levels when it decomposes.
It decreases the carbon dioxide levels by consuming the plant.
Carbon atoms are cycled continuously through an ecosystem. Each letter in the simplified diagram below represents a process in the carbon cycle.
Cadmium is sometimes used as an herbicide that prevents plants from incorporating atmospheric
CO2 into their tissues. This causes process A to be blocked.
Based on the diagram, which of the following will be the most immediate effect of this type of herbicide on the carbon cycle?
There will be a decrease in the combustion of fossil fuels.
There will be an increase in the rate of decomposition.
There will be a decrease in cellular respiration byproducts.
There will be an increase in atmospheric carbon dioxide.
Which of the following best describes water's ability to dissolve certain substances such as glucose, but remain separate from other substances such as oils?
Water molecules are polar, consisting of two partially positive hydrogen atoms, and one partially negative oxygen atom.
Due to hydrogen bonding, water is more dense as a liquid than a solid.
Water molecules can only form ionic bonds with polar molecules, such as glucose.
Water has an overall negative charge, which allows it to easily dissolve nonpolar substances like glucose.
Bodies of water, such as ponds, freeze from top to bottom, forming a floating sheet of ice. This can help aquatic organisms survive during cold winter months.
Which of the following statements explains why the ice floats on the surface of the pond?
The crystalline structure of solid ice makes it more dense than liquid water.
As water freezes, ionic bonds form between water molecules, preventing the ice from sinking below the surface.
The increased number of hydrogen bonds in ice compared to liquid water causes the water molecules in ice to be further apart.
The ice molecules have higher kinetic energy than the liquid water molecules, causing them to float.
Which of the following shows the most likely way that two water molecules will bond with each other?
Which of the following observations could be best explained by water’s high surface tension?
A human sweats in order to cool down.
A leaf floats on the surface of a puddle.
A local pond is slow to freeze, despite low air temperature.
A tree takes up water from its roots.
A biologist develops a simulation of the carbon cycle in a laboratory by setting up a closed ecosystem. The ecosystem consists of a glass container with an Earth-like atmosphere and a body of freshwater. In the water are a fish and an aquatic plant. The container is kept in well-lit and temperature controlled conditions.
Which of the following is likely to happen to the carbon dioxide level in the atmosphere if the plant dies?
It will increase due to lack of photosynthesis in the ecosystem.
It will increase due to the emission of fossil fuels from the decaying plant.
It would decrease due to decomposition of the plant.
It will decrease due to increased cellular respiration in the ecosystem.
What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"
Purity
Polarity
High heat capacity
Expansion upon freezing
Large bodies of water do not quickly fluctuate in temperature. Why?
Water is a solvent.
Water has a high heat capacity.
Water acts as a buffer.
Water is non-polar.
What two elements make up water?
Helium and oxygen
Hydrogen and oxygen
helium and carbon
oxygen and carbon
Attractions between water molecules are called
Covalent bonds
Ionic bonds
Polar bonds
Hydrogen bonds
Which types of compounds dissolve easily in water?
Polar and Nonpolar
Polar and Ionic
Nonpolar and Ionic
Covalent and Nonpolar
What is the number of valence electrons for Carbon (Group 14)?
1
2
3
4
How many electrons are in the water molecule total?
8
10
12
14
If a solution is increasing the amount of H+ ions then it is becoming a (an)
Acid
Base
Mixture
Solution
