The names and chemical formulae of some chemical compounds are written in the fi

Question

The names and chemical formulae of some chemical compounds are written in the first two columns of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. Then, write down in the third column of the table the chemical formula of the major chemical species that will be present in this solution. For example, you know water itself will be present, so you can begin each list with the chemical formula for water (H20). Note: major" chemical species are those present in concentrations greater than 10 mol/L major species present compound formula when dissolved in water CH2OH CH OH methanol Na NO sodium nitrate bromide CuBr

Explanation / Answer

We need to know the solubilities of species

so

for

NaNO3 --> highest solubility, due to Na+ ions from family IA and NO3- is very soluble

then

Cu(II)Br --> 55.7 g/100 mL (20 °C) approx

for methanol --> soluble

so...

the actual question:

CH3OH = molecular, won't ionize

so

major specie = CH3OH(aq)

b)

Na+(aq) + NO3-(aq) equimolar

c)

Cu+2(aq) < Br-(aq) in 1:2 ratio

This is due to the +2 charge

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