Qualitative Analysis Using Precipitation Reactions Lab Report

Procedure- The procedure for this lab includes many simple steps and a few different things we are testing. Our first Procedure was to combine water and salt to see what kind of reaction it would make. First we fill the graduated cylinder with 100 ml of water. We then measured 1.0 grams of table salt on a balance to get an accurate amount. After, we took the measured amount of salt and poured it into the water filled beaker. Lastly, we watched and recorded the reaction.

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

Add a magnet to the bottom of the paper and observe what happens. In experiment 2 fill a small beaker until it is half-empty with cold water. Obtain the test tube in the warm water and pour it into the cold water. In experiment 3 place a piece of magnesium in a test tube and add 10 drops of hydrochloric acid. Feel the bottom of the tube. In experiment 4 scoop a small amount of sodium bicarbonate to a test tube. Add 10 drops of 6M HCI. Feel the bottom of the tube. In experiment 5 combine 5 drops of barium chloride and 5 drops of sodium sulfate. In experiment 6 mix some sodium chloride in a test tube with 2 mL of

This is done through a change in temperature. Over time, two objects that are in direct contact will

Aim: To classify unknown substances according to their structure type and to observe how the structure of materials affects their uses.

Purpose: The purpose of this lab is to further observe four types of chemical reactions. This lab will show four types of distinct chemical reactions and will increase my knowledge on each type.

A chemical change can be determined by one or more of the following, the creation of gas, heat, precipitate or colour change. It cannot be easily inversed.

The chemical formula for sodium hydroxide is NaOH. It has a ph of 11 and is considered as a base. The chemical formula for hydrochloric acid is HCl and it has a ph of 2 and is considered as an acid. The chemical formula of ammonia is NH3 and it has a ph of 8 and is considered as a base. The chemical formula of sodium chloride is NaCl and it has a ph of 7 and is considered aa a base. The chemical formula for deionized water is H2O and has a ph of 7 and is considered neutral. The 7up had a ph of 3 and is considered as an acid. The Maalox had a ph of 8 and is considered as a base. The apple juice had a ph of 4 and is considered as an acid. The vinegar had a ph of 2 and is considered as an acid. When it comes to the color of the indicator in

Conclusion The mass of the recovered copper was 5.22g, much greater than the initial mass of copper, 2.09. The number of moles of the recovered copper was calculated to be 0.0821mol while the number of moles of the initial copper was calculated to be 0.0329mol. The percent of copper recovered was calculated to be 250.%, and the percent error of copper recovered was calculated to be 150.%. From what seems to have been an increase in copper from the initial mass to the recovered mass, it can be assumed that the copper solid recovered at the end of the lab contained compounds other than the expected copper, as there was no way for additional copper to be introduced into the reactions.

What are reactions? Reactions is a process that has changes in its system and force content of atoms. Theres different types of reactions. But the main reactions are: combination or synthesis reactions, decomposition reactions, substitution or single replacement reactions, metathesis or double displacement reactions. The combination or synthesis reaction is one of the most common type of reactions.

In the chemistry world, there are thousands of known chemical reactions that either occur in living systems, in industrial processes, or in chemical laboratories. Few of the types of reactions include Combustion, Synthesis, Decomposition, Precipitation, Single-Replacement, Double-Replacement, Acid/Base, and Redox. It is useful to be familiar with the different types of reactions, because it allows one to know what they are dealing with in a reaction, as well as being able to predict what might happen in additional chemical processes. The first basic type of reaction is Combustion.

The objective of this lab was to identify different substances based off their physical properties, which are characteristics of a substances that enable us to distinguish it from other substances.If each of the substances that are used are different then they will be distinguishable by their physical properties. To determine the differences we used; solubility, which is the property of a solid, liquid, or gaseous chemical substances (solute) to dissolve in a solid, liquid, or gaseous solvent to form a solution. We also used density, the degree of compactness of a substance, and the melting and boiling point of the substances which gave the degree temperature at which each substances would melt or boil.

Identifying Substances Using Properties Purpose: To identify unknown substances by observing their physical and chemical properties (e.g. colour, state, clarity, crystal shape, behaviour in water, behaviour in acid), and comparing them to the physical and chemical properties of known substances. Hypothesis: I predict that by observing and testing the properties, as well as comparing them to those of known substances, we can identify all 5 of the unknown substances.

Step 3: I used a stir rod to determine if the mixed solutions are a precipitate or a non precipitate depending on what forms (liquid or solid) based on the mixture after all mixtures

Molar Mass of NaHCO3 = 84.098 g/mol Moles in 0.10g = 0.10/84.098 = 0.00119 mol Moles in 0.20g = 0.20/84.098 = 0.00238 mol Moles in 0.30g = 0.30/84.098 = 0.00357 mol Moles in 0.40g = 0.40/84.098 = 0.00476 mol Moles in 0.50g = 0.50/84.098 = 0.00595 mol Moles in 0.90g = 0.90/84.098 = 0.0107 mol Molar mass of CH3COOH = 60.052 g/mol Moles in 5g = 5/60.052 = 0.0833 mol Amount of grams in 5mL of CH3COOH = 5mL* 1g/1mL = 5g CH3COOH