Inorganic contaminants present in a sample of water lab report

I don’t understand this Chemistry question and need help to study.

Chemistry lab report.

This is what I have done. The file that I have attached includes the results and the method parts. I am not completely sure about all the method and calculations section and I think it needs more work. All other sections are not completed. The rubric for the lab report is attached as well.

template_for_lab_report_1_gen_chem_Template for Lab report Cover page Title Name Class I. Introduction 1 page: - where you describe why you did the experiment - describe the theory about the different test - describe what you did to prove the theory II. Procedures and methods A. Preparation of a 1wt% solution for Unknown and “salt used” 1 gram of the salt was dissolved on a 100 grams of water in a volumetric flask B. pH Testing Electronic pH tester was used to test the pH of unknown solution. First, the pH tester was cleaned with water. Then, to test if the pH was working, it was used on water and the pH number was very close to 7. Then, the unknown solution was put in a beaker, and the pH meter was dipped to test the pH of the solution. Then, the solution was tested using pH strips as it turned blue. C. Solubility test Salt (solid) was added to several solutions of 50 ml each, and stirred vigorously. Then we observed how much salt dissolved in the solvent. each solution was rated as insoluble, slightly soluble or soluble. the solvents tested were, Acetone, ethanol, hydrochloric acid, sodium hydroxide, and water. D. Conductivity Testing The unknown solution was put in a graduated cylinder. Then, the conductivity meter was dipped in the solution to measure its conductivity. E. Flame Test To do the flame test, a metal strip was dipped in HCL and burned a couple times to clean it, then it was dipped in the salt, and the salt was exposed to the fire of a bunsen burner.when tested, the unknown and the salt used gave out a bright orange color. F. Precipitation test with Silver Nitrate and Barium Chloride the unknown salt and the used salt -1wt% solutions-were each added to solutions of barium chloride and silver nitrate in three different trials. The change in color of the final solutions indicated that a precipitate was formed. G. Preparation of solutions for gravimetric analysis a 1wt% solution of the unknown salt was prepared using the same method as in part A. As for the second solution (calcium chloride), an excess amount of calcium chloride- about 8 to 10 grams- was dissolved in 250 ml of water in a volumetric flask.