cations and anions‚ as well as observing‚ and documenting the chemical reactions. We will be demonstrating the reaction between a solution of Lead Nitrate with a chemical formula of PbNO3 2‚ and a Potassium Chromate solution with a chemical formula of K2CrO4. The end result from mixing the two solutions should have a combined set of either the Pb2+ or K+ cation and likewise with the NO3 2- or CrO4 2- anion in its chemical formula. This experiment will demonstrate the chemical reaction between the cations
Premium Chemistry Chemical reaction Titration
Selective Precipitation of the Barium Magnesium Group ABSTRACT The purpose of this lab was to identify the cations from the barium magnesium group present in an assigned unknown solution through selective precipitation. This was a qualitative lab where the theory of the common ion effect was used in several steps. Once the experiment was completed‚ it was determined that unknown solution #4 contained Ba2+‚ Sr2+‚ and Mg2+ ions. INTRODUCTION Selective precipitation is a part of chemistry
Free Solubility Solid Precipitation
formation of a precipitate. Materiel needed: Test tubes Rack of test tubes Plastic droppers Beakers Procedure: We prepare 7 beakers of 7 different solutions (that we mark from 1→ 7). We put separately around 50 ml of: HCl NaOH Na2CO3 K2CrO4 CaCl2 CuSO4 Unknown substance Using plastic droppers we mix 10 drops of one solution with 10 drops of another solution in a test tube‚ to get all in all 20 different test tubes. We then note the observation for each test tube. Name of the unknown
Premium Chemical reaction Sodium Chemistry
ppt and centrifuged again. 3) I added 2mL of H2O‚ put the test tube in the hot water bath and stirred for 3 minute with a stirring rod. 4) I then decanted the solution into another test tube. 5) I added one drop of 6M acetic acid and 3 drops of 1M K2CrO4‚ which formed a positive confirmation where yellow ppt was formed‚therefore it contained Pb+2 Identifying Hg2+2: 1) I took the white ppt formed formed from the first test and added 10 drops of 6M NH3. 2) I stirred the contents and then centrifuged
Premium Acid dissociation constant Base White
to a minute. Promptly centrifuge and transfer the heated supernate into a fresh test tube. Replicate the process a few more times and integrate the supernate. retain the precipitate for the testing of Ag+ if there was any. lastly add 3 drops of 1M K2CrO4 to the supernate. When a yellow precipitate forms then that confirms the presences of Pb Identification of Ag+
Premium Chemistry Bacteria Water
two are opposite ions that attract to one another. In this lab research‚ I learned that the following reaction will happen: lead nitrate + potassium chromate à potassium nitrate + lead chromate‚ the balanced chemical reaction is: Pb (NO3)2 + K2CrO4 --> 2 KNO3 + PbCrO4 Procedure Materials: - (1) 100ml Beaker - (1) 50 ml(s) of potassium chromate 1M solution - (1) 50 ml of lead (II) nitrate 1M - (1) 250 mL Erlenmeyer flask - (1) Buchner funnel - (1) Test tube Procedure: 1. Gather
Premium Ion Chemistry Potassium
I. Experiment 3: SEPARATION TECHNIQUES II. Objectives: * To learn different methods and techniques of separating components of mixtures * To appreciate the importance of such separation techniques * To apply different methods and techniques in separating components of mixtures III. Results and Observations Separation of components with different solubilities * AMMONIUM CHLORIDE‚ SODIUM CHLORIDE‚ SAND the wt. of mixture with evaporating dish after 1st heating is?? g. And after
Premium Solubility Liquid Evaporation
(PbNO3) and potassium chromate (K2CrO4) solutions B. Reaction between potassium permanganate (KMnO4) and oxalate ion (C2O42-) C. Iodine clock reaction A. REACTION BETWEEN LEAD NITRATE AND POTASSIUM CHROMATE SOLUTIONS Lead nitrate reacts with potassium chromate to form yellow lead chromate precipitate and aqueous potassium nitrate. The formation of a yellow precipitate indicates the completion of the reaction. The reaction is extremely fast. Pb(NO3)2 (aq) + K2CrO4 (aq) → PbCrO4 (s) + KNO3
Premium Iodine Chemical reaction Chemical kinetics
“Qualitative Test for some Cations 1”. For this exercise we obtained 3 test tube‚ each test tube was treated with different reagent (6N HCl‚ hot H2O‚ K2CrO4‚ 6N NH4OH‚ 6N HNO3). TT 1‚2 and 3 with reagent treatment 6N form a white precipitate‚ TT 1 with hot H2O was dissolved and color orange while TT 2 and 3 was undissolved. For reagent treatment K2CrO4‚ TT 1 form yellow precipitate‚ TT 2 treated with 6N NH4OH was dissolved while on TT 3 it form black precipitate. Lastly‚ for TT 2 treated with 6N HNO3
Premium Ammonia Silver Ion
tube. Two drops of 2-methyl-2-bromobutane were added to the third test tube. The test tubes were stopper and were shaken to mix the chemicals. The test tubes were observed for cloudiness or precipitation. Observations were recorded. 2mL of 0.1 M AgNO3 in absolute ethanol was added into three test tubes. One drop of 1-bromobutane was added to the first test tube. One drop of 2-bromobutane was added to the second test tube. One drop of 2-bromo-2-methylpropane was added to the third test tube.
Premium Solvent Ethanol Chemistry