The purpose of this lab is to identify the seven numbered solutions through chemical reactions. It was done by mixing the numbered solutions of known names but unknown number of distribution with each other and analyzing the chemical reactions. Research shows that NiCl2 is the green liquid. NiCl2 will not react with anything except with AgNO3 and Na2CO3, so the first step will be mixing all solutions with NiCl2 until those two chemicals are found. Na2CO3 will create bubbles (CO2) while AgNO3 does not when mixed with the other chemicals. This was used to identify which of the two is AgNO3 and which is Na2CO3. Once Na2CO3 has been identified, KC2H3O2 can be found because KC2H3O2 is the only substance that will not react with Na2CO3, so …show more content…
Because of this, we were able to predict what would happen when they were mixed. We put them into equations and calculated, using the solubility table on our periodic table sheet, what the reaction would be if we mixed each of the seven chemicals with one another and made a table of precipitants based on that. It was difficult to compare solid precipitants formed by various reactions, so we were unable to identify which was which though that. Luckily, one of the chemicals looked different compared to the others. NiCl2 solution was green unlike the other white ones; thus we were able to immediately determine which chemical the green one was. However, some reactions are able to form gases such as CO2 when mixing. This is because when double replacement occurs, one of the new reactions made could be a gas or decompose into a gas. This is call a gas evolution reaction. We successfully determined that 2HCl + Na2CO3 and Na2CO3 + H2SO4 would result in gas evolution reactions by doing extra research. These reactions could be distinguished from the others easily because the reaction would form gas bubbles and not solids. These reactions were also included in the