Group 1 Lab Report

Group 1:
All the elements that were tested from group 1 had a pH level of 12. This meant that all the tested elements produce an alkaline solution. Group one elements readily lose their valence electron as they wish to form a full valence shell this gives them all a low electron affinity. The group one elements have different electronegativity going down the group. Electronegativity of the elements decreases with the increasing the atomic radii. As the size of the radii atomic increased the further away the electron got from the nucleus. This also reduces the electrostatics attraction between the electron and the nucleus which means the electrons becomes more reactive. Therefore the reactions while going doing the list of group 1 elements increase.

All group one compounds were soluble, this was due to the reason that all these compounds are ionic compounds and that can form equal positively and negatively charged ions in solution. Water is polar and it can stabilize the positively and negatively charged components of the salts in solution which dissolves the compounds. The pH’s of the salts in solution varied with some producing a pH of approximately 7 and others producing a pH of 11. The difference in the solution pH is due to the strengths of the corresponding bases. Chlorides, Sulphates, Thiosulphates and bicarbonates all produced low pH in solution which suggests that these are weak bases. Carbonates and hydroxides produced a high pH in solution which suggests these are strong

All Group two compounds were all white and crystal looking this was due to the reason that all these were salts and mainly all slats are white crystal looking. The pH levels of the compounds diverse from approx. 7 to some of the alkaline solution producing a pH of 10. The difference in the pH levels is due to the alkalinity or acidity of the corresponding bases. Sulphates, Chlorides all had relatively low pH’s suggesting that all these bases are weak bases. All Hydroxides and Carbonate bases had a high pH level which suggests these are strong bases. Some group’s two compounds were soluble however some compounds were not soluble. This was due to the reason that some bases were weaker or stronger, for instance sulphates bases have low pH’s so it would be a weak base and therefore soluble like verse hydroxides bases have high pH levels so it would be a more strong base and therefore would be in soluble.

Group 1 & 2 compound comparison:
Both group 1 & 2 compounds looked similar; this was due to the reason that all these compounds were salts which are usually white crystal shaped. The pH’s of both group 1 and group 2 compounds were all above 7, this is because all the compounds are relatively acidic. Despite this were not many similarities in group one and group two compounds, this could be due to the reason that group one compounds formed +1 ion whereas group 2 compounds formed +2 ions which made