Question

In: Chemistry

A "silver" ring was purchased at a local store. It was stamped "sterling silver" which means...

A "silver" ring was purchased at a local store. It was stamped "sterling silver" which means that it must contain 92.5% by mass Ag. The remaining 7.5% may technically be any other metal. Copper is typically used for this. This ring was found to be magnetic, which suggests that the non silver part may contain iron or nickel as well. A small amount of the ring is dissolved in nitric acid, making a solution of the nitrate of any metal that would be present.

a. What group does each of the four metals belong to?

b. After the removal of the silver as the insoluble chloride, the solution is made basic with 6M NH4OH. If the solution turns Violet, with no blue color present, what cation was present in the solution?

c. What would the cation present be if the solution turned a very strong navy blue color instead, when the amonium hydroxide was added?

Solutions

Expert Solution

Q = mct
m = 75g
c= 1 cal/g-c0
t = 30C0

Q = 75 * 1 *30

Q = 2250 Calaries

7.A sterilig silver dish weight is 185

percentage of silver is dish = 92.5%

percentage of copper is dish = 7.5%

mass of silver in dish =185 *92.5/100
                                     =171.125g
mass of copper in dish = 185*7.5/100
                                        =13.875g


Related Solutions

1. Silver Corporation, which operates a department store, sells a television to a store employee for...
1. Silver Corporation, which operates a department store, sells a television to a store employee for $300. The regular customer price is $500, and the gross profit rate is 25%. The corporation also sells the employee a service contract for $120. The regular customer price for the contract is $150. How much must the employee include in income from both these transactions in total? a. $125 b. $30 c. $75 d. $0 2. Ellie (a single taxpayer) is the owner...
1. A resistor stamped with Red Red Black Orange Silver has what resistance? A. 2203 ohms...
1. A resistor stamped with Red Red Black Orange Silver has what resistance? A. 2203 ohms B. 220,000 ohms C. 22,000 ohms D. 660 ohms 2. The resistance created when one coulomb of charge is forced through a 1.0 volt difference in one second is A. 1ohm B. 10 ohms C. 0.001 ohm D. 1.0 kiliohm 3. the specific material resistivity depends on what? a. the type of metal b. the density of the material c. the cross sectional area...
You are the manager of a local sporting goods store and recently purchased a shipment of...
You are the manager of a local sporting goods store and recently purchased a shipment of 60 sets of skis and ski bindings at a total cost of $25,000 (your wholesale supplier would not let you purchase the skis and bindings separately, nor would it let you purchase fewer than 60 sets). The community in which your store is located consists of many different types of skiers, ranging from advanced to beginners. From experience, you know that different skiers value...
You are the manager of a local sporting goods store and recently purchased a shipment of...
You are the manager of a local sporting goods store and recently purchased a shipment of 60 sets of skis and ski bindings at a total cost of $25,000 (your wholesale supplier would not let you purchase the skis and bindings separately, nor would it let you purchase fewer than 60 sets). The community in which your store is located consists of many different types of skiers, ranging from advanced to beginners. From experience, you know that different skiers value...
A wedding ring has a mass of 7.804 grams and is made of gold and silver....
A wedding ring has a mass of 7.804 grams and is made of gold and silver. When the ring has been heated to 96.53
A container of one dozen large eggs was purchased at a local grocery store. Each egg...
A container of one dozen large eggs was purchased at a local grocery store. Each egg was measured to determine its diameter (in millimeters) and weight (in grams). The results for the 12 eggs are given in the following table. Weight is the dependent variable. Calculate the r-sqr, correlation coefficient, and explain each value. Index   1          2          3          4          5          6          7          8          9          10        11        12 Diameter (mm)            42.2     45.45   47.8     47.4     47.7     43.5     44.4     43.9     46.2     45.9     44.3    ...
Teresa purchased a ring for 100 in 1965. In 2015 Teresa gave the ring to her...
Teresa purchased a ring for 100 in 1965. In 2015 Teresa gave the ring to her granddaughter, Lindsey. At the time of the gift the ring was appraised at 850. In 2017 Lindsey sold the ring for 1,200. What is the amount and character of Lindsey ' s gain from thus sale
Sterling Steel Inc. purchased a new stamping machine at the beginning of the year at a...
Sterling Steel Inc. purchased a new stamping machine at the beginning of the year at a cost of $720,000. The estimated residual value was $76,800. Assume that the estimated useful life was five years, and the estimated productive life of the machine was 268,000 units. Actual annual production was as follows: Year Units 1 78,000 2 66,000 3 30,000 4 58,000 5 36,000 Complete a separate depreciation schedule for each of the alternative methods. (Round your answers to the nearest...
The One Ring company, a leading producer of fine cast silver jewelry, is considering the purchase...
The One Ring company, a leading producer of fine cast silver jewelry, is considering the purchase of new casting equipment that will allow it to expand its product line. The up-front cost of the equipment is $750,000. The company expects that the new equipment will produce a steady income throughout its 10-year life. a) If One Ring requires a 12% return on its investment, what minimum yearly cash inflow will be necessary for the company to go forward with this...
The company wishes to store heavier boxes on this overhead shelf which means a reach above...
The company wishes to store heavier boxes on this overhead shelf which means a reach above the shoulder would be in the danger zone for lifting. A) How high does the platform (or a step stool) need to be for your worker to reach a box on a 180cm high shelf with hands at shoulder height as shown in the right figure? Explain. State any assumptions you make (e.g., does the worker wear safety shoes?). B) Per OSHA 1926.1053, how...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT