Of course, there are always exceptions to trends and the most common one here is water. Water's liquid phase is denser than it s solid phase (a reverse of most of there substance). The reason for this is the characteristic of the particles ( IMF & shape). As you know or will know later in the year, water is a polar molecule which means it exerts a Coulombic force onto other water molecules (or anybody else). Also due to the shape of the molecule (a bent shape which you either know or will learn later). From this shape and IMF, water molecules arrange themselves in a hexagonal arrangement when it forms the solid phase (we call it ice). This hexagonal arrangement occupies more space/volume per molecule than in the liquid phase (where the molecules can move freely in 3-D space). So, this is why ice floats in water!
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Procedures
This lab is broken to two section. Half the groups will start with 1st section then do the 2nd section and the half will do the reverse.
<b>Using a Graduated Cylinder
1. Obtain a 25 mL graduated cylinder and Triple beam balance, mass the cylinder and record the mass in your data table..
2. Using the scale on the cylinder, measure out as close as possible 23 ml (or it could 23.00mL) and record the actual volume (remember to the sensitivity of the scale on the cylinder. sig fig rules)
3. Using balance, mass the cylinder and water and record that in your data table.
4. Pour the water outof the cylinder and down the sink.