Nickhil Dimri CTD Chemistry Blog

    During the Solubility Lab,  my partner and I identified an unknown salt. The purpose of this lab was to design a procedure that determines the identify of the unknown salt. In the lab, we dissolved different amounts of the unknown salt with 10 mL of water at different temperatures. Dissolving is the process in which molecules interact and attract each other to form a solution. Procedure -    First, we measured 100 mL of water in a beaker and increased the temperature from 20°C to 50°C using a hot plate. Then, we measured 5 g of the unknown salt on a balance. After that, we added the unknown salt to the to the water. All of the solute dissolved into the water. Realizing we made the mistake of having 100 mL of water instead of 10 mL of water, we measured 10 mL of water and increased the water temperature to 50°C. We added 5 g of the unknown salt. Only 3.9 g out of 5 g dissolved in the 10 mL of water. We concluded that the unknown salt was NaCl because 3.9 ...

   In the Gas Law Lab, we collected gas in a balloon that was given off by a powdered form of two Alka Seltzer tablets. We were able to do this because  the sodium bicarbonate (NaHCO 3 ) and citric acid (C 6 H 8 O 7 ) dissolved in the water (H 2 0) and produced carbon dioxide (CO 2 ). After that, we used the ideal gas law to determine the mass of the carbon dioxide (CO 2 ). Calculations Analysis Questions 1.  Discuss an area in this lab where experimental error may have occurred.    Experimental error could have occurred when some water might have spilled out when my partner and I were measuring the volume un the graduated cylinder. The balloon is not a perfect sphere. The measurement of the circumference.  could have been miscalculated. 2. Choose one error from above and discuss if it would make "n", the number of moles in  carbon dioxide (CO 2 ), too big or too small.    The first error  would m...