Organic Chemistry Answers

Calculate the total hardness of a sample of water containing following impurities 16.2 

mg/L of Ca(HCO3)2, 11.1 mg/L of CaCl2, 60 mg/L of CaSO4 and Mg(HCO3)2, 11.2 mg/L 

of MgCl2, 60 mg/L of MgSO4 and 19 mg/L of Mg(NO3)2.

4. What is the pH of a 0.350 M solution of lithium citrate? (Ka Citric Acid = 7.4 x 10-4

The N in a 0.4984-g sample of organic material is converted to NH₄HSO₄ by digestion with concentrated H₂SO₄. If the NH₄⁺ ions are precipitated as (NH₄)₂PtCl₆ and the precipitate is ignited to Pt, what is the percentage of N in the sample if the Pt weighs 0.1876 g?

To determine the total hardness of given water sample n/20 solution

The percentage of nitrogen in a fertilizer designated as 6 12 8 is

A 'breath test' used by traffic police to check drunken driving uses?

A. Tumeric on filter paper

B. Silica gel coated with saliva nitrate

C. Potassium permanganate-sulphuric acid

D. Potassium dichromatic-sulphuric acid

Please explain why the answer is D and not C

Write the enantiomer of the following compound:

COOH

H OH

CH3

Assign R/S configuration to both the compounds.

Draw the cis- and trans- forms of 1, 3-dimethylcyclobutane.

(i) will be polar in nature?

ii) has higher melting point?

Explain your answer giving reasons.

How does a chemist illustrate the molecular structure of THC

1.The waxy coating on the surface of apple skins contains an alkane with 27 carbon atoms. What is the molecular formula of this alkane?

2.The waxy coating that covers tobacco leaves contain a straight chain alkane having 31 carbons. How many hydrogens does this alkane contain?