Question

Devise a procedure for distinguishing between MgBr2 and MgI2 a. What reagent can be used to...

Devise a procedure for distinguishing between MgBr2 and MgI2

a. What reagent can be used to distinguish between MgBr2 and MgI2

b. Describe the different observations associated with MgBr2 and MgI2 after adding the reagent

c. Write the chemical equations of the reagent with each MgBr2 and MgI2

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

a) MgBr2 and MgI2 upon dissolving in water give the solution of Br- and I- respectively.

So to distinguish we need reagent which can give react with these ions separately and give different reactions.

Procedure:

Take 1 mL test solution and add 1mL AgNO3 solution to it. Observe the ppt color and separate the ppt using the centrifuge/decantation method. Take some ppt and add conc. NH3 solution and observe the ppt, if it gets dissolved or not.

b) Br- upon reaction with AgNO3 gives the cream ppt and this ppt gets dissolved in conc. NH3 solution.

However, I- also gives yellow ppt with AgNO3 but the ppt does not get dissolved in conc. NH3 solution.

c)

MgBr2 + 2AgNO3 ------> 2AgBr(s) + Mg2+(aq) + 2NO3-(aq)

AgBr(s) + 2 NH3(aq) → [Ag(NH3)2]+(aq) + Br:-(aq)

and

MgI2 + 2AgNO3 ------> 2AgI(s) + Mg2+(aq) + 2NO3-(aq)

AgI(s) + 2 NH3(aq) → No reaction!  

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
You have synthesized a redox reagent that is a complex between cobalt and six ammonia molecules...
You have synthesized a redox reagent that is a complex between cobalt and six ammonia molecules ([Co(NH3)6] 3+/2+). It cycles between the Co(II) and Co(III) oxidation states. Unfortunately, after you complete your synthesis, you learn that your potentiostat is broken and you have no way to measure the reduction potential of your compound. Fortunately, you realize that you have sufficient information from other experiments and from data tables to determine the potential for this reagent. This information is: The standard...
Grignard reaction questions? a. Give equations for a detailed procedure showing the conversion of 1-bromoheptane to...
Grignard reaction questions? a. Give equations for a detailed procedure showing the conversion of 1-bromoheptane to 3-decanol using a Grignard reaction. b. Why is it necessary to clean and cut the magnesium ribbon into small pieces in the preparation of Grignard reagent? c. Why care must be taken to have the reagents and apparatus completely dry when a Grignard reaction is performed. What could be a major side reaction if water were present? d. Ethanol is often present in solvent-grade...
What is the reagent used in the phenylalanine deamination test? A. Ammonia B. Ferric chloride C....
What is the reagent used in the phenylalanine deamination test? A. Ammonia B. Ferric chloride C. Phenylalanine D. Kovac's reagent Partial lysis of the red blood cells surrounding a bacterial colony indicate that the colony is ______. A. beta hemolytic B. alpha hemolytic C. gamma hemolytic D. nonhemolytic If you were to observe the cells under the microscope after the addition of the Gram’s iodine, what would their color be? A. All cells would be colorless. B. All cells would...
Why are “normal modes” use to describe coupled oscillations? A. The normal modes can be used...
Why are “normal modes” use to describe coupled oscillations? A. The normal modes can be used to describe the transfer of energy between different oscillators. B. Each normal mode describes an oscillation at a single frequency. C. Only one normal mode can be excited at a time. D. It allows for greater mathematical simplicity in doing the analys is. The general solution is just a (fill in the blank if you use this answer) ______ . If the answer is...
1. What is an "organic" chemical? What are the two most important elements that are present...
1. What is an "organic" chemical? What are the two most important elements that are present in organic chemicals? 2. In addition to the two elements specified in Question #1, name four other very important elements that are present in living systems and organic chemicals. 3. Define (what is the distinguishing feature?) and give a common example for each of the important organic chemical families. What is their main purpose in society (or what is your example used for), and...
Answer all questions Q2. The data-mining method that can be used in market segmentation to divide...
Answer all questions Q2. The data-mining method that can be used in market segmentation to divide consumers into different homogeneous groups is _____. a. data visualization b. cluster analysis c. market analysis d. supervised learning e. None of the above 2 points    QUESTION 3 Q3. The simplest measure of similarity between observations consisting solely of categorical variables is given by _____. a. the Euclidean distance b. the standardized Euclidean distance c. matching coefficient d. Jaccard's coefficient e. None of...
1. Write net ionic equations for: a. the reaction between hydrochloric and sodium hydroxide b. the...
1. Write net ionic equations for: a. the reaction between hydrochloric and sodium hydroxide b. the reaction between calcium and water ( assume that the solution containing the calcium hydroxide is dilute and that the calcium hydroxide has completely dissociated into its ions) c. the reaction between calcium and hydrochloric acid. 2. a.Arrange the equations in 1a and 1b so that algebraic addition yields the equation in 1c. b. Add your experimentally determined values for the molar heats of reaction...
You will apply the oxidation reaction to 9-fluorenol to obtain 9-fluorenone a) describe the role of...
You will apply the oxidation reaction to 9-fluorenol to obtain 9-fluorenone a) describe the role of each chemical in this reaction. reagent role 9-fluorenol H2CrO4 acetone ether hexanes b)after all of the 9-flurenol has undergone reaction, it is necessary to destroy the excess oxidizing agent in the reaction mixture. How is done? c) Imagine that you will monitor the reaction progress by TLC. Will the product be the higher or lower spot?What is the significant difference between 9-fluorenone and 9-fluorenol...
a) A surgical procedure requires 4 steps. The first can result in 2 possible outcomes, the...
a) A surgical procedure requires 4 steps. The first can result in 2 possible outcomes, the second in 6 possible outcomes, and the remaining two can each result in 5 possible outcomes. What is the total number of outcomes possible b)At the beginning of 2002, an ice cream shop claimed to have "nearly 928 different ice cream flavors." Assuming that you could choose from 928 different flavors, that you could have your ice cream in a cone, a cup, or...
Capacitors can be used to count individual electrons, if adding a single electron to one plate...
Capacitors can be used to count individual electrons, if adding a single electron to one plate causes a measurable voltage increase between the plates. (a) If the capacitor has capacitance C and there are N electrons on one plate (and N missing from the other), write a formula for the voltage between the plates. (b) If a single extra electron is added to a plate (N → N + 1 or ∆N = 1), by how much does the voltage...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT