Experimental Design Quiz
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5 questions, one answer each
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1. Which piece of apparatus would be most appropriate for measuring the volume of a liquid to the highest degree of accuracy in an experiment?
- A. A measuring cylinder
- B. A volumetric pipette
- C. A burette
- D. A gas syringe
2. In a filtration experiment, what is the name given to the solid particles that remain on the filter paper after the mixture has been separated?
- A. The filtrate
- B. The solute
- C. The residue
- D. The solution
3. A student needs to measure the temperature change during an exothermic reaction. Which apparatus would be appropriate and what is a disadvantage of using it?
- A. A burette; it measures very small temperature changes inaccurately
- B. A thermometer; it has a slow response time and may not record rapid temperature changes quickly enough
- C. A stop-watch; it cannot measure temperature at all
- D. A gas syringe; it is only designed for measuring gas volumes
4. When comparing two methods for determining the mass of a solid precipitate, Method A uses an electronic balance (±0.01 g) and Method B uses a traditional two-pan balance (±0.1 g). Which statement correctly identifies an advantage and disadvantage?
- A. Method A is faster but less accurate than Method B
- B. Method B is more accurate but requires more practice to use correctly
- C. Method A is more accurate and gives results more quickly, but is more expensive and requires batteries
- D. Method B is cheaper but cannot measure precipitates accurately
5. A student dissolves sugar in water to create a solution and continues adding sugar until no more will dissolve. They then filter the mixture to separate the undissolved sugar. Which statements correctly describe the components and why the solution became saturated?
- A. The solvent is sugar, the solute is water, and saturation occurred because all water molecules were used
- B. The solvent is water, the solute is sugar, the filtrate contains dissolved sugar, and saturation occurred because the maximum amount of sugar that could dissolve in the water at that temperature was reached
- C. The solvent is the solution, the residue is the filtrate, and saturation occurred because sugar cannot dissolve further
- D. The solvent is sugar, the solute is water, the residue is the filtrate, and saturation is impossible with sugar