T9 Lesson 4 Why Does Water Dissolve Sugar?

What happens to the sugar and color coating when an M&M is placed in water?

• The M&M melts completely.

• The sugar and color coating dissolve, leaving just the chocolate.

• The M&M becomes harder.

• The M&M changes color.

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NGSS.MS-PS1-2

Why does water dissolve sugar based on its polarity?

• Water and sugar are both non-polar molecules.

• Water is a gas and sugar is a solid.

• Both water and sugar are polar molecules with areas of positive and negative charge.

• Sugar is heavier than water.

What is the chemical formula for sucrose?

• C6H12O6

• C12H22O11

• H2O

• CO2

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NGSS.MS-PS1-1

What do the letters and numbers in the chemical formula C12H22O11 represent?

• 12 hydrogen, 22 carbon, and 11 oxygen atoms.

• 12 carbon, 22 hydrogen, and 11 oxygen atoms.

• 12 oxygen, 22 hydrogen, and 11 carbon atoms.

• 12 nitrogen, 22 oxygen, and 11 hydrogen atoms.

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NGSS.MS-PS1-1

What do the + and – signs around certain parts of the sucrose molecule indicate?

• The molecule is neutral.

• The molecule is non-polar.

• The polar parts of the molecule where an oxygen and hydrogen atom are bonded.

• The molecule is radioactive.

What happens when water dissolves sucrose?

• Water molecules repel sucrose molecules.

• Water molecules attract sucrose molecules, overcoming the attractions between sucrose molecules.

• Sucrose molecules become larger.

• Water molecules freeze.

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NGSS.MS-PS1-2

What is the role of positive and negative charges in dissolving sugar in water?

• They repel each other.

• They attract each other, allowing water to dissolve sugar.

• They have no effect.

• They cause sugar to solidify.

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What does the polarity of water mean in terms of its molecular structure?

• Water has no charge.

• Water has areas of slight positive and negative charge.

• Water is a solid at room temperature.

• Water is non-polar.

How do water molecules interact with sucrose molecules during dissolution?

• Water molecules ignore sucrose molecules.

• Water molecules push sucrose molecules away.

• Water molecules pull away sucrose molecules one by one.

• Water molecules freeze sucrose molecules.

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NGSS.MS-PS1-2

What is the main reason water can dissolve many substances like sugar?

• Water is a solid.

• Water is non-polar.

• Water is a universal solvent due to its polarity.

• Water is heavier than most substances.