Which may be added to one litre of water to act a buffer?

Which may be added to one litre of water to act as a buffer ?

What weight of NaCl is added to one litre of water so that Delta"T"//"K"_("f")=1/500?

Which can act as buffer?

2 g of sugar is added to one litre of water to give sugar solution. What is the effect of addition of sugar on the boiling point and freezing point of water ?

2 g of sugar is added to one litre of water to give sugar solution. What is the effect of addition of sugar on the boiling point and freezing point of water ?

which can act as buffer ?

which can act as buffer ?