Question

Although neither the american chemical society (ACS) nor the international union of pure and applied chemistry (IUPAC) have official definitions of "Soluble","slightly soluble".etc. The US pharmacopeia does, and these are given in the table below. make another table but this time use "grams of solute per 100 mL of solvent " For example an entry might be something like "From 0.01 g to 0.1 g" indicating that that much can be dissolved in 100 mL of water

Table 1. Solubility designations as listed in the USP

Description                                         mL of solvent required for one gram of solute

Very soluble                                                <1

freely soluble                                            from 1 to 10

soluble                                                       from 10 to 30

sparingly sluble                                        from 30 -100

slightly soluble                                         from 100 to 1,000

very slight soluble                                   from 1,000 to 10,000

pracically insoluble                                   >10,000

Answer 1

For very soluble:

<1 ml of solvent is required for 1 g of solute.

So, 100 ml of solvent can dissolve: [1/(<1)]*100 = > 100 g

So, > 100 g can dissolve in 100 ml of solvent.

For freely soluble:

Lower range = 1 ml for 1 g of solute

So, 100 ml will dissolve 100 g of solute.

Upper range = 10 ml for 1 g of solute

So, 100 ml will dissolve (1/10)*100 = 10 g of solute.

Thus the range to dissolve in 100 ml of solvent is from 10 g to 100 g of solute.

Similarly we can calculate for other descriptions.

Description	ml for 1 g of solute	g of solute in 100 ml of solvent
very soluble	<1	>100 g
freely soluble	from 1 to 10	from 10 g to 100 g
soluble	from 10 to 30	from 3.33 g to 10 g
sparingly soluble	from 30 to 100	from 1 g to 3.33 g
slightly soluble	from 100 to 1000	from 0.1 g to 1 g
very slightly soluble	from 1000 to 10,000	from 0.01 g to 0.1 g
practically insoluble	>10000	< 0.01 g