Inorganic Chemistry Answers

Why is it essential to wash the centrifugate containing bromine with carbon tetrachloride?

time?

The measured integration trace gives the ratio 0.90 to 0.45 to 2.70 to 1.35 for the peak at &= 1.52 , 1.39 , 1.21 and 0.93 , respectively. Use the table below to answer the following questions.

chemical shift (ppm) 0.5-5.0 and Description of H atom is ROH.

chemical shift (ppm) 0.7-1.3 and description of H atom is RCH3.

chemical shift (ppm)1.4-1.7 and description of H atom is R3CH.

chemical shift (ppm) 1.2 -1.4 and description of H atom is R2CH2.

chemical shift (ppm) is 2.1-2.6 and the description of H atom is RCH2CO.

chemical shift (ppm) is 3.1-4.2 and description of H atom is RCH2Br or RCH2CI.

chemical shift (ppm) is 9.0 -10.0 and the description of H atom is RCOH.

chemical shift (ppm) is 10.0-12.0 and the description of H atom is RCOOH

question

a) what compound is responsible for the signal at & =0 (1 mark answers with detailed explanation for every step please )

b) How many different types of proton are present in compound Z? (1 marks answer with detailed explanation for every step please)

Topics:Further synthesis and analysis 

Q1

Describe a simple chemical test for distinguishing between the following pairs of compounds:

a) cyclohexane and cyclohexene (2 marks detailed answers with explanation for every step answers please)

b) propanol and propanone (2 marks detailed answers with explanation for every step please)

c) propan-1-ol and propan-2-ol (3 marks detailed answers with explanation for every step please)

Detailed answers please with explanation for every step please

Q2

Suggest how the following syntheses could be carried out in the laboratory:

a) chloroethane to ethanoic acid (5 marks detailed explanation with answers please)

b) chloroethane to 2-hydroxypropanenitrile (5 mark detailed answers with explanation for every step please)

c) chloroethane to aminoethane (1 mark with detailed answer with explanation for every step please)

1. Aluminum oxide, Al2O3, is decomposed to produce solid aluminum metal and oxygen gas. 
2. Write the balanced chemical equation for this reaction. 

(2 marks - K)

1. How many grams of aluminum metal can be produced from 100.0 g of Al2O3?

(6 marks - TI)

Q3

The EDTA -4 ligand is multidentste with the structural forma shown below. Four of the atoms which can bond to a metal ion are marked with crosses.

Questions

a) using crosses, indicate where two other atoms could bond to a metal ions when EDTA4- forms complexes .

Q3

The EDTA4- ligand is multidentate with the structural formula shown below. Four of the atoms which can bond to a metal ion are marked with crosses.

Questions:

a) using crosses, indicate where two other atoms could bond in metal ions when EDTA4- forms complexes( 2 marks)

b) explain the term multidentate ligand? (2 marks)

c) The EDTA4- ion reacts with metal(II) ions according to the equation shown below

(M(H2O)6)2+ + EDTA4- —> M(EDTA)2- + 6H2O

in a titration, using a suitable indicator, the following measurements were made:

A solution containing 0.0624 g of hydrated copper(II) sulphate reacted exactly with 25.00 cm3 of 0.0100 M EDTA 4- solution.

using the information, calculate the value of n in the formula of the hydrated copper(II) sulphate, CuSO4 . nH2O (6 marks)

Please top answers 🙏🏾

Q2

when cobalt (II) chloride is treated, under certain conditions, with bidentate ligand, NH2CH2CH2NH2, ( which can be represented by the symbol en), the compounds ( CoCI2(en)2) CI is formed.

questions

a) what is the oxidation state of cobalt in the compound formed?

b) what is the meaning of the term bidentate as applied to a king and?

state the co-ordination number of cobalt in this compound?

d) when this compound is treated with aqueous silver nitrate, explain why only a single mole of survey chloride is produced per mole of compound?

please detailed answers 🙏🏾

Transition element

a) give the full electronic configuration of the copper atom ?

b) explain why some copper(I) are colourless yet most copper(II) compounds are coloured?

c ) complete the following electron configurations.

(I) Cu 1s2 2s2 2p6 3s2 3p6 ….

(II) Cu+2 1s2 2s2 2p6 3s2 3p6 ….

Q2

with the exception of argon, the period 3 elements form oxides.

a) write the equation to show the reaction of aluminium with oxigen.

b) This reaction occurs very readily. Suggest why saucepans made from aluminium can be safely heated on a gas cooker.

c) for the oxides of sodium , silicon, phosphorous and sulphur, state the physical state at 20 c(degree) and the type of bonding that occurs.

d) what is the equation for the reaction of sulphur dioxide with water?

e) Silicon dioxide and phosphorus (V) oxide are added to separate samples of pure water and each mixture is stirred. Estimate the pH value of each value.

(detailed answers please 🙏🏾 )