Organic Chemistry Answers

Sometimes after obtaining a crude product we recrystallize it. What is meant by recrystallisazation and what is its purpose on the crude product?

CH3-CH2-C-C-CH2-CH3

Draw resonance contributors for the carbanion that would be formed if meta-chloro- nitrobenzene could react with hydroxide ion.

In titration of the mixture to a methyl orange end point with standard NaOH, why does none of the NaOH is neutralized by the NH₄Cl

What is the correct chemical reaction/equation for:

a.) glucose with Fehling's reagent

b.) sucrose with Tollen's reagent

1.     Explain briefly about esters being hydrolyzed. Draw an example reaction equation to illustrate your explanation.

Why acetyl salicylic acid doesnot give positive result with ferric chloride?

How do isomers presence influence the industrial process? Their diffrences in properties that they might have and the possible consequence of ignoring the presence of isomerism?

In the following problems, there are a number of strategies that could be used to solve for x.  Work through each problem until you can decide which strategy to use and explain any assumptions you could make to solve the problem more easily.

iii)  Consider the following            

0.250 moles of CO2 were placed in a 1L closed container at 20000C, 

CO2(g)         ⇌       2CO  +  O2(g)        K=6.40x10-7

iv)    H2 and I2 are placed in a closed container at 4400C, to form HI(g).  If K=49.7, 

4.00 mol of H2(g) and 2.00 mol I2(g) are placed in a 2.00 L container. 

H2(g)    +     I2(g)    ⇌     2HI(g)

In the following problems, there are a number of strategies that could be used to solve for x.  Work through each problem until you can decide which strategy to use and explain any assumptions you could make to solve the problem more easily.

i)  I2(g) and Br2(g) react in a 2.0L closed container at 1500C to produce IBr as shown below:

          K= 1.2x102 and the container initially contained 4.00 mol of I2 and 4.00 mol of Br2, 

I2(g)   +   Br2(g)      ⇌       2IBr(g)

ii) Consider:

If K= 1.60 x10-5,   0.80 mol NOCl is placed in a 2.00L container at 350C. 

2NOCl(g)     ⇌       2NO(g)  +  Cl2(g)