Essay about Conductivity Lab

The protein molecules in many foods provide the amino acid building blocks required by our own cells to produce new proteins. To determine whether a sample contains protein, a reagent called Biuret solution is used. Biuret solution contains copper ions. However, the chemical state of the copper ions in Biuret solution causes them to form a chemical complex with the peptide bonds between amino acids (when present), changing the color of the solution. Biuret solution is normally blue, but changes to pink when short peptides are present and to violet when long polypeptides are present.

A sodium ion (Na+) occurs when a sodium atom loses an electron and gains a positive charge

3. Experiment: Use the Gizmo to find the carrying capacity with Ample, Moderate, and Little land. List the carrying capacities below.

12. Write the balanced chemical reaction of the product of the reaction described above (problem 11) with NaOH. Is the product of this reaction soluble in aqueous solution?

In paragraph two, it states "Pure water contains very few ions, so it does not conduct electricity well. When table salt is dissolved in water, the solution conducts very well, because the solutions contain ions.". In paragraph four, it explains how laundry ammonia can conduct electricity. It states "When ammonia dissolves in water, it reacts with the water and forms a few ions.". In conclusion, paragraph five explains more about how ammonia can cause electricity when it is put into a solution with vinegar.

Which solution has a pH closest to neutral? (Stomach acid; blood; lemon juice; soap, household bleach)

a. Pyrite hypothesis = If pyrite is added to water, it will make the water more acidic.

Resting potentials require ions as they play a vital role in the process. In the surface membrane of a cell there are protein carriers. These actively pump Na+ ions out of the cytoplasm to the outside of the cell. At the

4. NaOH, sodium hydroxide is a strong base. It reacts with HCl and forms NaCl and H2O.

Aqueous solutions of ionic substances will be experimented with in this Ionic Reactions lab. Aqueous solutions are solutions that water is solvent. After ionic substances dissolve in water, ions separate and become surrounded by water molecules. When these ion separate, its called dissociation.

2. Bring the Styrofoam cup close to another person's hair. What do you observe? What conclusions can you make regarding charged Styrofoam?

In the last article "Conducting Solutions" the main purpose is that it explains how different materials conduct electricity. In this passage, they describe an experiment with sugar and water. It says that when sugar is dissolved in water, the solution does not conduct electricity because there are no ions in the solution. It also describes experiments with vinegar and ammonia. It says that they work well as a mixture because the ammonia reacts with the acid in vinegar and hey form a lot of

Review Sheet Results 1. Explain the effect that increasing the Na+ Cl- concentration had on osmotic pressure and why it has this effect. How well did the results compare with your prediction? Your answer: The increase of the Na+Cl- concentration increased osmotic pressure the Na+ Cl- molecules diffused through the 50 mwco membranes and didn't go through the 20 mwco membranes. the more Na+Cl- we added to the 20 mwco membrane, the more the osmotic pressure went up. When I looked at my results I noticed when Na+Cl- was added to the 50 mwco membrane, there was no increase in osmotic pressure. This is becasue the Sodium chloride couldn't diffuse through the 50 mwco membranes. The higher concentration of molecues on one side of the mwco membrane forces the water movement to move to the side of greater solute concentration. 2. Describe one way in which osmosis is similar to simple diffusion and one way in which it is different. Your answer: Osmosis is similar to simple diffusion because both of these precesses have the passive transport characteristic. This is where particles in a solution move from an area of high solute concentration to an are of low solute concentration. Also neither of these processes need energy from an outside source to function. Osmosis is different than simple diffusion because in osmosis, if we have a selectively permeable membrane, this membrane is

As I add the silver nitrate to the calcium chloride the calcium will begin bonding with the sulfate to form solid calcium sulfate and the silver will begin bonding with chloride to form solid silver(I)chloride. We know this because calcium is more reactive than silver and sulfate is more reactive than cl so the two more reactive particles will bond and the two less reactive will bond. They will both form solids because chloride ions when bonded with silver ions are insoluble and sulfate ions when bonded with calcium ions are also insoluble. The reason that all of the previously listed information is important to the conductivity is that if all reactants react to produce solids then there will be no aqueous ions floating around which is essential to conduct electricity. Since we now know that when we have and even amount of both reactant the solution produced will not conduct electricity and we also know that each of the aqueous reactants (when isolated) will conduct electricity, I predict as long as we have excess of one of the reactants in the final solution it will conduct electricity.

Part A.1. Sodium metal is also readily oxidized by oxygen. If the product of the reaction were dissolved in water, what would be the color of the litmus for a litmus test? Explain. What is the product?