42. A 1.00 g sample of a silver-containing ore is dissolved in dilute nitric acid. The solution is neutralized and then selectively electrolyzed to deposit the silver metal,requiring 670 s of 0. 10 A current. What is the mass percentage of silver in the ore? D(A)2.5%(B)3.0%(C)3.7...
The cyanide process has largely replaced an amalgam process in which silver is dissolved in mercury. Some of the silver produced today is used, as in the past, in making coins (see coin; money; bimetallism). Large quantities are used for silver utensils and jewelry, and in plating ...
Nitric acidTwo-phase electrowinningStrippingSolvent extraction experiments were carried out to recover silver from nitric acid solutions using as the extractants calix[4]arene tetramide (LBC) and its thio-analogue (THIO) dissolved in dichloromethane. The stoichiometry of the formation of the silver-...
In the ozone treatment, it is preferable that means for promoting decomposition of dissolved ozone are used in combination, such as irradiation of the above resin particle with ultraviolet rays or ultrasound with the particle immersed in an ozone solution and addition of alkaline water to an ozone...
Silver nitrate is prepared by dissolving silver metal in dilute nitric acid. The solution is evaporated and residue is heated to dull red heat with concentrated nitric acid to decompose impurities such as copper nitrate. Residue then is dissolved in water, filtered, and recrystallized to obtain pur...
both hydrazine (N2H4) and phosphorous acid can reduce Ag to metallic silver. The reaction equation is (1)N2H4 4AgNO3-→ 4Ag N2 4HNO3;(2) h3PO3 2AgNO3 H2O-→ 2Ag H3PO4 2HNO3 solubility in water (g/100ml)grams dissolved per 100ml of water at different temperatures (℃): 122g/0 ...
First, the reagent Silver nitrate is dissolved in distilled water, and then the theoretical amount of reagent hydrochloric acid (or reagent sodium chloride solution) is added under constant stirring, and the reaction quickly produces white silver chloride precipitate: the precipitate is no longer ...
The behaviour of selenium and tellurium dissolved in nitric, hydrochloric or perchloric acid and in their mixtures was tested during the atomization proces... L Pszonicki,W Skwara - 《Journal of Analytical Atomic Spectrometry》 被引量: 14发表: 1999年 The effect of specific chloride adsorption on...
• COPPER Sample solution:100 mg/mL Analysis:To 5 mL of the Sample solutio n add 6 N ammonium hydroxide, dropwise, until a precipitate first formed is just dissolved. Acceptance criteria:No blue color is produced. ADDITIONAL REQUIREMENTS • PACKAGING AND STORAGE:Preserve in tight, light-...
In the sputtering process, the temperature increased to reach 200 to 300 °C. Hence, silver oxide dissolved and released oxygen. It allowed silver nanorods to grow without oxygen (Figure 7). Figure 7. (A) Synthesis of silver nanorods by sputtering process: oxidation reduction growth (ORG). ...