USA
(A)
2.5 g glycerine
+ 50 ml alcohol
(B)
4.6 g glycerine
+ 50 ml alcohol
(C)
1.2 g glycerine
+ 50 ml alcohol
1. Identify the solute and the solvent.
2. Identify whether the above solution is aqueous or non-aqueous.
3. Identify which of the three solutions is the most concentrated one.
4. Based on your acquired knowledge, propose a technique which allows to render solution(A)
having the same concentration of solution (C)
5. Half of the amount of alcohol in solution (B) is evaporated. Is the obtained solution more or
less concentrated? Justify.
Exercise 2:
Consider the following solutions of copper sulfate and water in 3 test tubes.
Test Amount of copper
Tube sulfate (grams)
Amount of
water (mL)

For a family dinner, jose’s mom baked a loaf of bread. during the meal, his grandmother commented, “this bread is so dense! ” what do you think his grandmother meant by the word dense? you have some ideas regarding density already, but this experiment will enrich your understanding of the relationship between mass, volume and the density of objects. when making measurements in this experiment we will be using si units, the international system of units. the purpose of using si units is to have the ability to communicate and compare data results with other experiments without having to make conversions. measurement symbol si unit length m meter mass kg kilogram volume l liters density kg/l kilograms per liter any calculations that are performed during this experiment will ultimately be reported in scientific notation. recall that scientific notation is extremely important when we have data that is extremely small or large. scientists rely on a standard form of communication to quickly make hypotheses and judgements based on data. what is the density of block a? a0kg/l what is the density of block b? a1kg/l what is the density of block c? a2kg/l what is the density of block d? a3kg/l what is the density of block e? a4kg/l which block is the densest? a5