Chemistry, 02.08.2019 19:10 IsoSaysHi

How many of the following responses are true? 1. sn1 leads to a racemization of sterechemistry due to the planar carbocation intermediate 2. sn2 leads to a racemization of sterechemistry due to the planar carbocation intermediate 3. a tertiary alkyl halide will tend to react through an sn2 mechanism because there is little hindrance to backside attack and a tertiary carbocation is not very stable 4. 1-bromopentane will undergo substitution through an sn1 mechanism 5. if r-3-bromo-3-methylhexane is allowed to react with oh- the product will be a 50%/50% mixture of r-3-methyl-3-hexanol and s-3-methyl-3-hexanol

Answers: 2

Show answers

Answers

Answer from: Quest

personal, she chose to do it.

Answer from: Quest

You know how the first one if filled up like the objects do the same but with the other categories

Answer from: Quest

There are no metaphors.

Answer from: Quest

the missing options are :

(1) lower boiling point and a lower freezing point(2) lower boiling point and a higher freezing point(3) higher boiling point and a lower freezing point(4) higher boiling point and a higher freezing point

answer : the correct answer is option (3) higher boiling point and a lower freezing point

explanation :

when a non volatile solute is added to a solvent like water, it results in elevation of boiling point.

let us find the increase in boiling point of water when cacl₂ is added to water to make a solution of 1 m

step 1 : find molality of the solution

let us assume we have 1 l of solution.

$m = \frac{moles (solute)}{l ( solution)}$

$1 m = \frac{moles (cacl_{2})}{1 l }= 1 mol cacl_{2}$

let us convert this to grams of cacl₂.

molar mass of cacl2 is 111 g/mol

grams of cacl₂ = $1 mol \times \frac{111g}{mol} = 111 g cacl_{2}$

mass of solute = 111 g

assuming density of solution same as water which is 1g/ml we have ,

mass of solution = density * volume

mass of solution = $\frac{1g}{ml} \times 1000 ml = 1000 g$

mass of solution = mass of solvent + mass of solute

mass of solute = 1000g - 111g

mass of solute 889 g = 0.889 kg

the molality of the solution can be calculated as

$molality = \frac{mol (solute)}{kg ( solvent)}$

$molality = \frac{1mol}{0.889kg}$

molality = 1.12 m

step 2 : find boiling point elevation.

the elevation in boiling point is calculated as

$\bigtriangleup t_{b} = i \times k_{b} \times m$

here δtb = boiling point elevation

i = vant hoff factor which is the number of ions formed by the solute .

cacl₂ dissociates as $cacl_{2} \rightarrow ca^{2+} + 2 cl^{-}$

it forms 3 ions . therefore,

i = 3

m = molality which is 1.12 m

kb is constant for a given solvent. for water it is 0.512

$\bigtriangleup t_{b} = 3 \times 0.512 \times 1.12$

$\bigtriangleup t_{b} = 1.7$

the boiling point of water increases by 1.7 °c

step 3: find freezing point depression.

when a non volatile solute is added to water, it results in decrease in freezing point.

the formula to find freezing point depression is

$\bigtriangleup t_{f} = i \times k_{f} \times m$

kf is constant for water and its value is 1.86

$\bigtriangleup t_{f} = 3 \times 1.86 \times 1.12$

$\bigtriangleup t_{f} = 6.2$

the freezing point of water decreases by 6.2 °c

therefore we can say that, the solution will have a higher boiling point and a lower freezing point

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 21:30, alexandroperez13

It takes 945.kj/mol to break a nitrogen-nitrogen triple bond. calculate the maximum wavelength of light for which a nitrogen-nitrogen triple bond could be broken by absorbing a single photon.

Answers: 3

continue

Chemistry, 22.06.2019 05:00, mahhvelousg97

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

Answers: 2

continue

Chemistry, 22.06.2019 05:50, mayamabjishovrvq9

Why doesn't heat added to water make the tempature rise above 100c

Answers: 2

continue

Chemistry, 23.06.2019 07:40, emma4113

Did the detergents containing enzymes work better at removing stains than those containing no enzyme? why or why not?

Answers: 2

continue

You know the right answer?

How many of the following responses are true? 1. sn1 leads to a racemization of sterechemistry due...