Title : Reaction of Carboxylic Acids Objective : To Determine The Reaction of Carboxylic Acids Procedure : As referred to Lab manual. Results: A. Salt Formation |Compound |Solvent |Solubility | |Benzoic Acid |Cold Water |Partially soluble | |Benzoic Acid |10 % NaOH |Soluble | B. Salt Hydrolysis Sodium acetate solution changed the color of litmus from red to blue. C. Reaction With Sodium Carbonate Observation : A lot of gas bubbles was released.
A solvent is the substance in which the solute is being dissolving. Water Water is chemically H2O. Water molecules are formed when two hydrogen molecules and one oxygen molecule combine. Water is a good solvent due to its polarity. When an ionic or polar compound enters water, it is surrounded by water molecules Salt or Sodium Chloride Salt is a mineral that is composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of ionic salts.
This standardized solution of sodium hydroxide can then be used to determine the concentration of acid in the sample of gastric juice. Acid-base titration is when a titration is carried out with a known volume of a strong acid which in this case is HCl, of unknown concentration, with a standard solution of a strong base NaOH. The reaction taking place is: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(aq) A titration can be used to find the concentration of an acid in gastric juices because the acidity in the gastric juices is mainly caused by hydrochloric
Chemistry 1 1/20/13 MODEL CHEMLAB EXPERIMENT: CATION AND ANION “ THE CHEMISTRY REACTION” Introduction The purpose of this experiment is to demonstrate a double replacement reaction of ionic compounds. We will be demonstrating The reactions of ionic compounds that are supposedly soluble in water, If a reaction should occur during this experiment, then one of these ionic compounds are identified as not being soluble in water and a precipitate will occur. We may ask ourselves, what is ionic compounds?, Ionic compounds simply are where two or more ions are held next to each other by electrical attraction. One of these ions have an positive charge (cation +) and one will have a negative charge (anion -). Let’s experiment and observe Whether these ions will have a reaction or indeed soluble in water.
In redox reaction, one element or compound is reduced and gains electrons, while on the other hand, the other element or compound is oxidized and loses electrons. For this lab, through the given oxidation and reduction numbers from balancing the equation and the electrons, it was shown that Manganese was reduced while Iron was oxidized. Also from the equation, the movement of electrons can be noticed, as it was added or subtracted from the substances. In order to balance an equation, there must be same number of elements on both sides, with the exception of hydrogen and oxygen. From there, in order to balance oxygen, water molecules are enumerated to the opposite of the equation/reaction.
CuSO4 4. What is the molar mass for anhydrous (without water) copper(II) sulfate? 159.62 g/mol Result: Observation: Some gray white substances precipitated from the water in the crucible. Data: * Mass of purified crucible and lid 30.59g * Mass of crucible and lid and hydrate 31.57g * Mass of hydrate alone 31.57g- 30.59g = .98g * Mass of crucible and lid and dehydrate 31.11g * Mass of dehydrate alone .52g This lab shows that hydrates are made up of crystal solids and water,
A mixture of Br-, Cl- and PO43- ions was subjected to an anionic column packed with polym-N(CH3)3+OH-, eluted with 9mM sodium carbonate. (i) Arrange the above analyte ions in order of increasing retention time in the anionic column. (3 marks) (ii) Describe how the analyte ions were separated in the anionic column according to order of retention time answered in part (2)(i). (8 marks) 3. An unknown compound is irradiated with an excitation photon.
Assessed Practical: Planning Introduction: The aim of this experiment is to find the enthalpy change for the decomposition of sodium hydrogen carbonate. 2NaHCO = Na2CO3 + CO2 + H2O Using the enthalpy change of the following reactions. Sodium Hydrogen Carbonate: NaHCO3 + HCl = NaCl + CO2 + H2O Sodium carbonate: Na2CO3 + 2HCl = 2NaCl + CO2 + H2O Apparatus Sodium hydrogen carbonate Sodium carbonate Polystyrene Cup x 2 Measuring cylinder 50cm³ x 2 Weighing scale Weighing boats Thermometer degrees Spatula HCl acid 2M Prediction Background Information Hess' Law states that the enthalpy change for a reaction is the same whether the reaction occurs directly or in steps. This is a direct consequence of the fact that enthalpy, is a state function. One of the applications of Hess' Law is to determine the enthalpy change for a reaction by combining other reactions to get the desired reaction, then combining the enthalpy changes for the reactions to get delta H for the reaction under consideration.
Required Materials: Solids: KNO3 unknown concentration, KNO3 Liquids: Tap Water, DI Water Other: 1 burette, 1 1000 mL beaker, 5 test tubes, thermometer, heating pad Objectives: • To determine the effect of temperature of the solubility of a salt. • To construct a solubility curve for the salt. • To determine the mass of an unknown size sample of the salt. Theory: Solubility is a measure of t he amount of one substance that can be dissolved in a measured amount of another substance. In this experiment we are going to measure the solubility of KNO3 in water at various temperatures.
An acid is a chemical compound that dissociates in a solution and releases hydrogen ions which lowers the pH. A base is the opposite so it donates hydrogen ions making the pH rise. A compound that neutralizes both acids and bases when added to a solution is referred to as a buffer. This is all tied together by the process of titration, which determines the concentration in a solution by adding to it a substance of known concentration in specific amounts. Before testing this experiment, I expected the pH to increase when the acid was added and to decrease when the base was added.