The acid strength on starting was about The four heats from one absorber charge are drawn into a barrel, and after cooling over night the supernatant solution is sampled for copper. The application of this solution to successive lots of roasted tailing, from which about 10 lb.
SO2 by volume, can be used for the reduction. The reaction that occurred in step 7 was a dehydration reaction. At the end of the first two weeks it was deemed advisable to try to get more material through the furnace, and a scheme was worked out to give each charge 8 hr.
In all cases there was considerable fume given off and the flame had a characteristic bluish color. However, it is difficult mechanically, because the cuprous chloride is a solid and the strongly oxidizing gases given off at the anode must not come in contact with it. CO on the fifth hearth and this for only a short time.
CO2 and answered the purpose very well. The CO2 gas was forced through the cylinders by means of a small compressor. The insoluble, consisting mostly of lime and carrying some copper, settled readily and could be worked up in the smelter process for its copper value without trouble.
A sponge iron with a copper equivalent of 2. Experiments were made on this line by one of the writers several years ago and gave quite satisfactory results. The average copper content of the tail solutions was 0. The precipitation of the copper in a concentrated condition by a simple process, in a form easily washed and handled.
Complete data on this furnace have not been obtained. A woolen bag is used to remove the fine dust and fume. Then it was decided to increase the salt content of the solution to 8.
Actually, from our solutions, 2 to 2. A mixture of parts of slightly moist cuprous chloride, 65 parts limestone, and 10 parts coke was melted in a No.
About this time the muffles began to crack and let air in. The furnace was so equipped that hot partly roasted calcine from another furnace was fed to the first hearth by a steel conveyor.
An entirely satisfactory anode material has not yet been discovered, although magnetite, apart from being rather brittle, seems to answer the requirements fairly well. The product made by the furnace was magnetic, but showed no signs of metallic iron and would not precipitate any copper.
It would figure about as follows: The first lot was prepared by grinding the coal, mixing with the calcine and grinding the mixture so that 96 per cent, passed 40 mesh.
The solution changes from the blue cupric color to a greenish-brown color, and some Cu2Cl2 is precipitated. Following are the data of one of these runs: SO2 by volume does not give satisfactory results.
The reaction between copper and nitric acid is an exothermic reaction. The residue in the bag consists of fine dust, elemental sulphur arsenic, and sulphuric acid, and is very corrosive, the bags lasting only about 6 hr.
Toward the end of the experiments, the muffles had quite a cake in the lower corners and on the bottom, which seemed to be more or less fused to them, and was impossible to clean out.
However, a copper equivalent of 3. The absorber is charged with about lb. Exothermic and produced nitrogen dioxide gas Exothermic, precipitate formed, solution became thicker, and gas was produced.
The efficiency of the FeS in the laboratory was The pyrometer rod was not stuck down in the mixture, but was above it. A series of laboratory experiments had been made in December using Diamondville coal, Sunnyside coke, and charcoal as reducing agents. Cl, was leached for 2 hr.
It is evident from this reaction that only one-half as much iron is required, to precipitate the copper from cuprous chloride as from a cupric salt. When the CuO was washed, the excess hydroxide ions that could have remained from the previous reaction were removed.
The absorption of the SO2 gas is almost complete for the first hour, and then gradually decreases to about 60 per cent.Definition and examples of double replacement reactions.
Predicting and balancing neutralization and precipitation reactions. Single replacement reactions. Complete ionic and net ionic equations. The insoluble product compound is called the precipitate. The solvent and soluble components of the reaction are called the supernatant or.
Single Replacement Reactions Lab. Metals: Copper Lead Zinc Magnesium Silver Calcium Solutions: Copper (II) sulfate Silver nitrate Lead (II) nitrate Zinc sulfate Magnesium nitrate Procedures 1.
Using a well plate and the chemical given, determine which reactions will occur between the metals and the solutions. Black precipitate NR NR. Chemical Transformations of Copper Introduction: In this experiment, a weighed amount of copper metal is transformed, through a series of reactions, into other copper-containing compounds, and is eventually returned to the metal state.
rather than simply being colored blue by the blue precipitate. Part C: Preparation of Copper(II) Oxide.
were easily prone to contamination, leading to a false interpretation of precipitate in A Introduction: When chemical reactions occur, it goes throug h one of six common reactions: synthesis, decomposition, single -replacement, double-replacement, combustion and acid-base.
Copper Lab; Butane Lab: Purpose. The purpose of this The reaction that occurred in step 9 was a single replacement reaction. 3. If this was an incomplete reaction, there would be leftover solid zinc that would be weighed with the copper precipitate, and the zinc would increase the measured final mass of the copper and cause a.
Start studying Experiment 28 chemistry of copper. Learn vocabulary, terms, and more with flashcards, games, and other study tools.Download