Sulphate CuSO

Normal salt (NaCl) and a mixture of salt and soft coke commonly Magnesium sulphate (MgS04)J Copper sulphate (CuSO )... 

If a little sodium hydroxide (NaOH) is placed in a test tube containing a solution of copper sulphate (CuSO ) a white precipitate will fall to the bottom of the tube. After this action has taken plate, there is present in the tube copper hydroxide and sodium sulphate. The sodium changed place with the copper and the copper changed place with the sodium. Such a chemical action is said to be one of exchange or substitution. 

Make up 1.249 g of reagent-purity copper(II)sulphate (CuSO/ 3 H2O)... 

Copper Reagent (Harding, 1932). A. Dissolve 13 gm. of pure crystalline copper sulphate (CuSO, flHjO), in water, and make up to 1 litre. 

Acid copper sulphate test t 16 wt.% H2SO4 -1-100 g/l CuSO, (-1- metallic copper) 72 h exposure to boiling solution 1. Appearance of sample upon bending 2. Electrical resistivity change 3. Change in tensile properties -1- 0-30 to -1- 0-58 Chromium-depleted area... 

In alcoholic solution cupric sulphate combines with nitric oxide to form a double compound of the formula CuSO NO.8... 

To appreciate the action of a drying agent of class (a), let us imagine some anhydrous copper sulphate in an evacuated vessel provided with a pressure gauge, and water is allowed to enter slowly the temperature is assumed constant at 25°. The results may be best expressed by means of a vapour pressure - composition diagram (Fig. 1,20, 1). The initial system is represented by the point A the pressure will rise along AB until the monohydrate CuSO jHgO commences to form at B. 

The CuSO transference numbers vary little with temperature (1.4). The agreement with recent values remains within 0.01 even up to CuSO concentrations approaching 1 M. a fact which prompted Pikal and Miller to describe Hittorfs work as a remarkable achievement ( ). Hittorf studied a number of different silver salts (nitrate, sulphate and acetate) and he noted that the amount of silver ions transported per faraday varied from salt to salt. He also discovered, to his evident astonishment, that the cation transference number for silver nitrate dissolved in water was not the same as for silver nitrate dissolved in ethanol (0.427 at 4 0. This unexpected result, he wrote, warns us to take great care in the interpretation of the data. 

Fig. 8.6 Scanning electron micrographs of a copper electrodeposit from an acid sulphate solution at various times, illustrating the development of nodular growth at the limiting current. Nominal deposit thicknesses are as follows, (a) 10 pm. (b) 15 pm. (c) 20 pm. (d) 30piti. (0.07 molditi CuSO 1 mol dm H SO 22 C and with a rotating-cyLinder cathode.) (Courtesy Dr D. R. Gabe Loughborough University of Technology.)...

Fit up the apparatus as shown in Fig. 75, p. 224, replacing the cell W, by the cell Cu solution of CUSO4 Cu or the cell Zn solution of ZnSO Zn connected in series with the standard cell Wj. By means of the two-way key, the point of balance on the bridge wire is determined, with the cell W, alone in the circuit, and then for the cell Wx tr ether with one of the above cdls. If the two copper (or zinc) electrodes are uniform, the point of balance should be the same in the two cases, the cells Cu solution of CuSO Cu and ZnJ solution of ZnSOx Zn should exhibit no e.m.f. If, however, an e.m.f. of more than i millivolt should be found (for method of calculation, see p. 226), then the two copper (or zinc) electrodes should be placed in a solution of copper sulphate (or zinc sulphate) and short-circuited for several hours or a... 

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