Questions: Since water molecules are polar, substances will easily dissolve in it, but substances will not dissolve in it.

Since water molecules are polar, substances will easily dissolve in it, but substances will not dissolve in it.
Transcript text: Since water molecules are polar, $\qquad$ substances will easily dissolve in it, but $\qquad$ substances will not dissolve in it.
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Solution

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Solution Steps

Step 1: Understanding Polarity and Solubility

Water is a polar molecule, meaning it has a partial positive charge on one side and a partial negative charge on the other. This polarity allows water to dissolve other polar substances and ionic compounds effectively due to the attraction between opposite charges.

Step 2: Identifying Substances That Dissolve in Water

Polar substances and ionic compounds will easily dissolve in water because the positive and negative ends of the water molecules can surround and interact with the charged parts of these substances, breaking them apart and allowing them to mix uniformly with the water.

Step 3: Identifying Substances That Do Not Dissolve in Water

Non-polar substances do not dissolve well in water because they lack the charge differences that water molecules can interact with. Since there is no attraction between non-polar molecules and water, they tend to remain separate.

Final Answer

\(\boxed{\text{polar}}\) substances will easily dissolve in it, but \(\boxed{\text{non-polar}}\) substances will not dissolve in it.

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