the difference between mineral oil and water using a hand lens. * Making iodine in water- We added one drop of potassium iodide and sodium hypochlorite (bleach) then mixed the two together producing iodine. * Making iodine in oil-We added two drops of mineral oil‚ one drop of water on the mineral oil‚ then added one drop of potassium iodide and sodium hypochlorite. Producing Iodine. Results: In class we conducted four experiments on
Premium Chemistry Scientific method Chemical reaction
Standardisation of a Solution of Sodium Hydroxide: Introduction: In a lot of cases it isn’t possible to prepare a solution by accurate weighing of the solute‚ dissolving in water and diluting to volume. There are many possible reasons for this‚ but in the case of sodium hydroxide‚ the solid absorbs moisture from the air‚ and also reacts with carbon dioxide from the air. In that case‚ it cannot be accurately weighed in air. In an experiment like this‚ a solution of the approximate required concentration
Premium Titration
salt compound being applied to the driveway is made up of in order to get a clear picture of how it may be affecting the grass growth. Salt is sodium chloride that occurs naturally on earth as mineral halite. When mineral halite evaporates‚ it turns into salt lakes. The chemical compound is NaCl with 60.663% elemental chlorine (Cl) and 39.337% sodium (Na). Salt crystals are cubic in form and can be modified by temperature. Salt that is commonly used for deicing is rock salt also known as halite
Premium Sodium chloride Water Sodium
observed | Ethanol (c2H5OH) | No | Nothing changes | Nothing changes | Calcium Hydroxide (Ca(OH)2) | Yes | Light bubbles | Light bubbles but more than in anode | Potassium Bromide (KBr2) | Yes | Produced yellow color and bubbles | Bubbles | Sodium Iodide (NaI) | Yes | Produced yellow brown and bubbles | A lot
Premium Potassium Sulfuric acid Sodium chloride
Chemical Reactions I. Purpose – The purpose of this lab was to observe different type of chemical reactions to write and balance chemical equations. II. Hypothesis: If you mix two chemicals together‚ then they will change color and/or bubble/fix. III. Procedure - Workstation 1: 1. Light the Bunsen Burner 2. Add 5 – 8 mL of HCL to a test tube that’s in the test tube rack 3. Drop a 2 – cm piece of Mg ribbon into the test tube 4. Record Observations 5. Clean Workstation
Premium Chemical reaction Sodium Sodium chloride
PART IX - SPICE AND SALT 106. Prohibition to sell sub-standard spice (1) No person shall import‚ process‚ store‚ expose for sale or sell any spice which does not comply with the standard specified in paragraph (2). (2) (a) Spice shall be the sound leaves‚ flowers‚ buds‚ fruits‚ seeds‚ barks or rhizomes of plants that are suitable for use as condiments for imparting any flavour or aroma to food; (b) Aniseed shall be the dried‚ ripe fruit of the plant
Premium Spice Salt Apiaceae
11/17/2011 The Preparation of Calcium Carbonate Purpose: To create chalk (calcium carbonate) and to find the percentage yield in order to see the amounts of anhydrous sodium carbonate and calcium chloride were used up. Also to see if there’s any alterations like mass differentials. Objectives: 1. To introduce the concept of “limiting factor” in a chemical reaction 2. To practice a. Writing a balanced equation b. Determining the number of moles of each reactant and product
Premium Sodium Stoichiometry Sodium chloride
The hypothesis for both experiment which involved iron( III ) Nitrate and sodium hydroxide for the first experiment and antacid tablet in water was that the mass would increase by a small amount since during the reaction the product will gain additional energy and mass. Apparatus and Materials: Eye protection test tube two hundred and fifty milliliters beaker Balance to measure the masses dilute solutions of sodium hydroxide and iron(III) nitrate
Premium Chemistry Sodium hydroxide Mass
There are different kinds of compounds‚ ionic‚ covalent‚ and acidic and over all of this the atoms making up the compounds are either binary or polyatomic. The simplest compounds to name are binary ionic compounds‚ for example NaCl‚ which is named Sodium Chloride. Na having a positive oxidation number goes first followed by Cl which having a negative oxidation number goes last and is changed from Chlorine to chloride the -ide indicating its negative charge. Of course‚ the
Premium Chemistry Chemical compound Ion
in neonatal care might have an indirect effect on low-birth weight For the last 20 years‚ thanks to advances in neonatal technology‚ doctors were able to save babies whose time spent in the womb had to be shortened because of particular problems. Those preterm childbirth also seem to pose a problem of low-birth weight among the babies conceived with the help of neonatal technologies. Low birthweight is a weight of less than 5 pounds‚ 8 ounces‚ low birth weight can cause heart & respiratory diseases
Premium Childbirth Pregnancy Fetus