Chemistry Topic 2: Solutions

"What is matter?"

"Anything with mass and volume"

"What are the two types of matter?"

"Pure and impure"

"What are pure substances made of?"

"Elements or compounds"

"What are impure substances called?"

"Mixtures"

"What is a mixture?"

"Physically combined substances"

"How can mixtures be separated?"

"Physical methods"

"Name two physical separation methods."

"Filtration and evaporation"

"What are the two types of mixtures?"

"Solutions and suspensions"

"Is dissolving a physical or chemical change?"

"Physical change"

"Where do solute particles go when they dissolve?"

"Between solvent particles"

"What is a solution?"

"A solute dissolved in a solvent"

"What is the substance that dissolves called?"

"Solute"

"What is the liquid that dissolves a solute called?"

"Solvent"

"What does a soluble solute and solvent form?"

"Solution"

"What does soluble mean?"

"Can dissolve"

"What does insoluble mean?"

"Cannot dissolve"

"How are solute particles distributed in a solution?"

"Uniformly"

"Do particles settle in a solution?"

"No"

"What type of mixture is a solution?"

"Homogeneous mixture"

"What does homogeneous mean?"

"Uniformly mixed"

"What does a solution look like?"

"Transparent"

"What is the most universal solvent?"

"Water"

"What solvent is commonly used in perfume?"

"Ethanol"

"What is the formula for the mass of a solution?"

"Solute mass + solvent mass"

"What principle states that no mass is lost?"

"Conservation of mass"

"What is a solution with relatively more solute called?"

"Concentrated solution"

"What is a solution with relatively less solute called?"

"Dilute solution"

"What is solubility measured as?"

"Solute mass per 100 g solvent"

"What is a saturated solution?"

"A solution containing the maximum dissolved solute"

"What three factors affect solubility?"

"Solute type

"Does salt dissolve better in water or oil?"

"Water"

"Does iodine dissolve better in alcohol or water?"

"Alcohol"

"How does higher temperature affect most solids' solubility?"

"It increases"

"Why does heating usually increase solubility?"

"Particles move faster"

"How can more solute dissolve in a saturated solution?"

"Heat it or add solvent"

"What three factors affect the rate of dissolving?"

"Surface area

"Which dissolves faster: powder or lumps?"

"Powder"

"Why does powder dissolve faster than lumps?"

"Larger surface area"

"How does stirring affect dissolving?"

"It speeds it up"

"Why does stirring speed up dissolving?"

"It mixes particles"

"How does heating affect the rate of dissolving?"

"It speeds it up"

"What is a suspension?"

"Undissolved particles dispersed in a fluid"

"What does an insoluble solute and solvent form?"

"Suspension"

"What type of mixture is a suspension?"

"Heterogeneous mixture"

"What does a suspension look like?"

"Cloudy"

"What happens when a suspension is left standing?"

"Particles settle"

"What is an example of a suspension?"

"Muddy water"