Please note that this procedure was adapted from the “Observation of Chemical and Physical Changes” LabPaq Lab manual (Hands-On Labs Version 42-01-82-00-03, 2015)…
We know that that the end point of the titration is reached when, after drop after careful drop of NaOH, the solution in the flask retains its pale pink color while swirling for about 30 seconds (as opposed to the pink color simply disappearing as the base mixes into the solution).…
Please remember to show all your work for the calculations in questions 1 and 2. These can be added at the end of this document (see Calculations Section). Complete the yellow shaded regions in the document below.…
If an air bag has a volume of 36 L and is to be filled with nitrogen gas at a pressure of 1.15 atm at a temperature of 26.0°C, how many grams of NaN3 must be decomposed?…
Materials and Methods: Part 1: Cation Analysis: The experiment was performed on 4 cations: K+,…
1. In the chemical formula for ammonia, NH3, what does the subscript 3 represent? (a) the number of ammonia molecules that will bond together (b) the number of nitrogen atoms in each molecule of ammonia (c) the number of nitrogen and hydrogen atoms in each molecule of ammonia (d) The number of hydrogen atoms in each molecule of ammonia 2. The diagram above shows a block from the periodic table. The number six represents the following consumers eats only producers?…
Purpose: To determine which mole ratio of Zinc and Copper II Sulfate produces the greatest temperature change in degrees celsius.…
100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.998 g/mL) to…
Describe the patterns and trends that you see. Are there any relationships between physical state and the property you chose? [10 pts]…
One way to test a material for the presence of sodium bicarbonate is to take a sample and add HCl (Hydrochloric Acid) and see if a chemical reaction (bubbling, releasing Carbon Dioxide) occurs. If this chemical reaction does occur, then the material does in fact contain Sodium Bicarbonate.…
The luminous yellow flame is smoky because no air is entering the burner and hydrocarbon is converted into carbon dioxide…
11) Any part of a system with uniform composition and properties is called a _______.…
The purpose of this lab was to see which solutions are soluble and which are not. We were able to see this by mixing certain solutions together and observing changes that occurred.…
1. To determine the species present in aqueous solutions of compounds by using the solubility rules.…
The problem is: Which battery lasts the longest out of four different brands, Duracell, Energizer, Eveready and Rayovac?…