I. Introduction The purpose of this experiment is to determine the pH values of acids‚ bases‚ and buffers of distilled water and 10.0 buffer using measured concentrations of Sodium hydroxide (NaOH) and/or Hydrochloric acid (HCl). Acid is a compound typically having a bitter taste and capable of nullifying alkalis and releases hydrogen ion when added to a solution‚ or containing an atom that can accept a pair of electrons from a base (McKinley‚ Dean O’Loughlin‚ & Stouter Bidle‚ 2016). Bases are water-soluble
Premium Acid Base Sodium hydroxide
Title : Investigation of Action of Saliva and 3M Hydrochloric Acid in Two Carbohydrate Solutions Objective : To investigate the action of saliva and 3M hydrochloric acid in two carbohydrate solutions Results : Table 1: Observations Conclusions Solution A Benedict’s test : Initial blue solution changed to brick-red precipitate. Little amount of brick-red precipitate suspended in solution. The solution was translucent. Iodine test : Yellowish-brown remained the same. Abundant amount of
Premium Glucose Starch Enzyme
Since an acid + carbonate Salt + water + Carbon Dioxide‚ and lime water (Calcium Hydroxide) precipitates to Calcium carbonate when exposed to CO2‚ then if the unknown substance is placed in Hydrochloric acid and the captured gas causes precipitation (precipitation in ionic compounds generally form if the opposite charged electrons of two substances are attached‚ hence those with same charges do not form precipitate) in the lime water‚ it must
Premium Chemistry Solubility Hydrogen
determined. MATERIALS: 0.24 M sodium thiosulfate‚ Na2S2O3(aq)‚ 6.0 M hydrochloric acid‚ HCl(aq)‚ 2-1x8 (or 1x12) well Titertek strips‚ 4-micro-tip 1 mL Beral pipets‚ timer‚ cotton swabs‚ 24-well reaction plate‚ permanent marking pen PROCEDURE: 1. Practice adding water and starting the timer until you have mastered the technique. See the attached Titertek procedure sheet. Label three 1 mL Beral pipets for thiosulfate‚ S2O32-(aq)‚ hydrochloric acid‚ HCl(aq)‚ and water‚ H2O. Fill one well in a 24-well reaction
Premium Rate equation Chemical kinetics Reaction rate
reaction rates and concentration (research paper) By katie prestage what are reaction rates? The rate of reaction is the speed in which a reaction takes place. This can be measured by the rate in which a reactant is used up‚ or the rate a product is created. If a reaction has a low rate‚ it means that the particles are combining at a slow speed. If the rate is high‚ it means that the particles are coming together at a fast speed. For example‚ the rusting of iron through oxidation has a slow
Premium Reaction rate Chemical reaction Chemical kinetics
Conductivity of electricity of molten oxide E) Solubility in water F) pH of solution in water G) Classification of oxide (acidic‚ basic or amphoteric) H) Structure of oxide (simple molecular‚ giant molecular‚ giant ionic) I) Reactions with hydrochloric acid and/or sodium hydroxide. It is expected that some trends will appear across the period three oxides. Conductivity of electricity of molten oxide is likely to occur in the metal oxides as they have giant metallic structures which are capable
Free Oxygen Oxide Chlorine
4A.2 RRL 4A.2.1 Coagulation of Proteins Coagulation of protein refers to sticking together‚ like a blood clot‚ usually as a result of denaturation or coming out of solution due to abnormal ionic strength or a change of solvent. Definite characteristics of the proteins are changed when they are coagulated‚ among which is loss of solubility in water and dilute salt solutions. In some instances and under certain conditions the coagulation process may be reversible. (Campbell‚ et.al‚ 1979) 4A.2.2
Free Hydrochloric acid Sodium chloride Egg white
purification and isolation of various substances. There are two phases in chromatography: 1. Stationary Phase – a solid that does not move. In this experiment was the chromatography paper. 2. Moving Phase – a liquid. In this experiment 0.1% of Hydrochloric Acid was used as the solvent. In all chromatographic separations‚ there is an important relationship between the solvent‚ the chromatography paper‚ and the mixture. The main requirement of the solvent is to dissolve the mixture needing to be separated
Premium Chromatography Analytical chemistry Gas chromatography
Title: Zinc and Copper II Sulfate Lab Purpose: To determine which mole ratio of Zinc and Copper II Sulfate produces the greatest temperature change in degrees celsius. Background: This experiment will be looking for color change‚ temperature change‚ and precipitation change. Some background knowledge I know is how to balance equations. I also know side effect of a chemical change‚ in this experiment there was a color and temperature change. Other background knowledge is using and applying the
Premium Brown Purple Green
magnesium reacts with a variety of dilute acids. In order to make comparisons between the acids‚ I shall use my results to work out how much heat would be given out if 1 mole of magnesium reacted with an excess of each acid. The acids I shall use are hydrochloric acid‚ sulphuric acid‚ nitric acid and ethanoic acid. What I already know Magnesium reacts with most dilute acids to give a magnesium salt and hydrogen. For example: Mg + 2HCl Mg + H2SO4 MgCl2 + H2 MgSO4 + H2 I discovered from an A’ level text
Premium Hydrogen Sulfuric acid Acid