SALTS AND THEIR PREPARATION SALTS A salt is a compound formed when the hydrogen ions in an acid are replaced by metal ions or by ammonium ions. Compounds in which the H+ ions in an acid have been replaced by ammonium ions (NH4+) are called ammonium salts. NOTE: •An anion is a negatively charged ion. Hence:•Hydrochloric acid gives chlorides. E.g. sodium chloride‚ ammonium chloride. •Nitric acid gives nitrates. E.g. barium nitrate‚ copper nitrate. •Sulphuric acid gives sulphates. E.g. silver sulphate
Premium Ammonia Sodium Ion
use the standard set up) The limestone cycle: 1. Burn the limestone chip/ limestone powder in a test tube in a Bunsen flame → calcium oxide 2. Put calcium oxide in water → calcium hydroxide solution + left over limestone 3. Filter the leftover limestone 4. Blow bubbles using a straw into the calcium hydroxide solution → limestone Flame colors: (I copied a table from the internet because it isn’t in the book‚ the ones in red I’m pretty sure you have to know‚ and the ones in the yellow are the
Premium Sodium hydroxide Chlorine Carbon dioxide
poured into the column. Most of the remaining solvent from the slurry was drained‚ but some minor bubbles formed in the sand. The compound was dissolved in a few drops of dichloromethane. 0.303 grams of adsorbent was added‚ and the solvent was evaporated. This was poured into the column. Some more solvent was added and the column was run. The first yellow band was run to near completion‚ but the bubbles in the sand made the column run too slow to finish the second band. Therefore‚ gravity filtration
Premium Solvent Acetic anhydride Chemistry
A. Goal and Purpose: Session 1: In this lab‚ we will achieve a simple Friedel-Crafts alkylation of anthracene. The choice of anthracene as an aromatic substrate stems from two considerations. First‚ there is a question of regioselectivity. Second‚ anthracene and its derivatives are highly visible under UV light. Session 2: In this lab‚ we will complete a partial conversion of 9-acetylanthracene using m-chloroperoxybenzoic acid (mCPBA). We will also determine by NMR‚ the regiochemistry of the
Premium Sodium Chemistry Temperature
mixture into the glass beaker. I added 50mL of distilled water to the mixture. I then lit my burner and moved the stand over the flame and set the beaker with the mixture over the flame. I stirred the mixture several time and when I began to see small bubbles forming I poured the liquid into a paper cup. I then added 20mL of distilled water back into the beaker with the now sand and repeated setting it over the flame until a near boil. I then added this water to the other water in the paper cup and set
Premium Water Sodium Sodium chloride
Expected results When there is sugar fermentation in both butt and slant the agar is yellow showing production of acid. H2S reacts with ferric ammonium citrate to form a black product called ferrous sulphide‚ and gas production is seen by cracks or bubbles forming in the agar. This observation is evident only when the organism tests positive. CITRATE TEST Materials * Citrate agar slant * Inoculating loop * Culture colony Principle Some
Premium Escherichia coli PH indicator Bacteria
the other contaminates would have produced a wider‚ more polluted field. I believed that all the water would have been contaminated with the dirt had been mixed in. This exercise may demonstrate the need to discover better more efficient ways to filter and purify water in the future. Introduction This Lab we explored how contaminants affect the water supply. Contaminants can be commonly found in household products from dishwashing soap to paint‚ to oil and more. There are more robust versions
Premium United States Environmental Protection Agency Waterborne diseases Water pollution
find the unknown’s identity1. Experimental An unknown substance labeled Unknown 2 was obtained. Solubility test: Water (1 ml) was added to a test tube‚ and then the unknown (2-3 drops) were also added to the test tube. A pipet was used to blow bubbles
Premium Chemistry Chemical compound Chemical substance
Reactions in Aqueous Solutions: Metathesis Reactions and Net Ionic Equations Introduction: Metathesis or double decomposition reactions are a reaction in which two compounds react to form two new compounds‚ with no changes in oxidation number. The ions of two compounds exchange partners. AX + BY AY + BX This reaction can occur between two inorganic salts when one product is insoluble in water‚ driving the reaction forward. A typical example is as followed and is considered a molecular equation
Premium Sodium chloride Chlorine Chemistry
Using forceps‚ peel the membrane from the underside of a small piece of onion. Place the membrane flat on a clean‚ glass slide and add one drop of iodine solution. Use a pin to carefully lower the cover slip over the slide‚ ensure there are no air bubbles before the use of the slide. Set the microscope to its lowest power objective lens (x4) and make sure it is in line with the optical tube‚ also that the microscope light is turned on. After preparation of the slide and microscope‚ carefully place
Premium Lens Optics Microscope