experiment? – To allow easy mixing of solutions by swirling. 2. Why is the funnel removed from the burette after adding the acid solution? – so that the drops from the funnel will not fall into the burette. 3. In using a burette‚ why is it important to (a) rinse it with a little of the solution it is going to contain? – to remove any residual water and so avoid dilution of the acid solution when it is poured into the burette. (b) to clamp it vertically? – to enable the liquid level to be read correctly
Premium Hydrochloric acid Chlorine Sodium carbonate
Unit 3 assessment O1 Analysis of fertiliser-an extended experimental investigation Background: In this investigation you will analyse the composition of a lawn fertiliser‚ or ‘lawn food’. You may use external sources to help you complete the this section. Q1. Why is each of the elements Nitrogen‚ Phosphorus‚ sulfur and iron included in lawn food? ______________________________________________________________________________________________________________________________
Premium Titration Hydrochloric acid Potassium permanganate
a Double Displacement. C.) Zinc and Hydrochloric Acid‚ my hypothesis is a Single Displacement. D.) Alcohol and Oxygen‚ my hypothesis is a Combustion. E.) Lead (II) Nitrate and Potassium Iodide‚ my hypothesis a Double displacement. F.) Copper and oxygen‚ my hypothesis is a synthesis. G Magnesium and oxygen‚ my hypothesis is a synthesis. H.) Acetic acid and Sodium bicarbonate‚ my hypothesis is a double displacement. I.) Copper (II) carbonate and Hydrochloric acid‚ my hypothesis is a double displacement
Premium Sodium bicarbonate Aluminium Chlorine
Section Assignment 3.4 Part F – The Reaction of Iron Nails with a Copper Solution Introduction: The experiment in this activity involves the reaction between a copper (II) chloride solution with iron nails and the mole ratios involved in the reaction. Measurements are taken to determine the moles of each reactant involved in the reaction and thus the number of atoms or molecules involved. Apparatus and Materials: Refer to the reaction of iron nails with a copper solution assignment in Module
Premium Iron Water Hydrogen
with an acid? Theory/Hypothesis: In this experiment the researcher and their team will be performing tests on a catalyst (proteins found in potato) to see what will happen when the catalyst in a Hydrogen Peroxide reaction is treated with an acid before the reaction occurs. The researcher hypothesizes that the after treating the catalyst with an acid the amount of gas pressure produced will decrease. Variables: The independent variable in this experiment is the pH level/amount of acid added to
Premium Hydrogen PH Chlorine
marble chips and hydrochloric acid‚ and to see what differences in the rate of this reaction arise when different concentrations of acid are used. Below is the word equation for this reaction: Calcium Carbonate + Hydrochloric Acid = Calcium Chloride + Carbon Dioxide + Water Below is the fully balanced chemical equation for this reaction. CaCo3 + HCl  CaCl2 + CO2 + H2O Aim The aim of this investigation is to find out whether the concentration of the acid affects the rate
Premium Chemical reaction Hydrochloric acid Chlorine
phenolphthalein indicator – saturated barium chloride (BaCl2) – sodium dichromate crystals – concentrated hydrochloric acid – water glass – wine glass – milk glass – beer mug | Safety | All chemicals must be handled carefully and with respect. The solids and liquids used in this inquiry are safe for you to use with the following precautions: * It is recommended that safety glasses be worn. * Acids and Bases are caustic in high concentration; therefore‚ concentrations being used should be diluted
Premium Chemistry Hydrochloric acid Sodium chloride
Mandatory Experiment 6.2 Studying the effects on reaction rate of (i) concentration and (ii) temperature Theory The reaction used is that between a sodium thiosulfate solution and hydrochloric acid: 2HCl(aq) + Na2S2O3(aq) → 2NaCl(aq) + SO2(aq) + S(s)↓ + H2O(l) The precipitate of sulfur formed gradually obscures a cross marked on paper and placed beneath the reaction flask. The rate of reaction‚ and consequently the time taken to obscure the cross‚ depends on a number of variables such
Free Chemical reaction Hydrochloric acid
Rubber Stopper‚ Gas Syringe METHOD: 1. Wash all apparatus. 2. Measure and transfer 5g Calcium Carbonate to Petri Dish. 3. Measure and transfer 25cm3 of HCL to Beaker. 4. Place acid into conical flask and Calcium Carbonate and cover Immediately with rubber stopper to prevent gas from escaping. Apparatus should adopt the fashion below: Diagram showing apparatus set up.
Premium Carbon dioxide Calcium carbonate 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