Chemistry, 27.09.2019 04:00 Madsissabell

Write the formulas of the compounds formed by al3+ with the following anions: no3−, hco3−, so32−, po43−. use the given order of anions?

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Answer from: bricefitzpatrick0429

Al(NO_3)_3 , Al(HCO_3)_3 , Al_2(SO_3)_3 , AlPO_4 .

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

1. Here aluminium is having an oxidation state of +3 called as $Al^{3+}$ cation and anion is NO_3^- . Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral Al(NO_3)_3 .

2. Here aluminium is having an oxidation state of +3 called as $Al^{3+}$ cation and anion is HCO_3^- . Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral Al(HCO_3)_3 .

3. Here aluminium is having an oxidation state of +3 called as $Al^{3+}$ cation and anion is $SO_3^{2-}$ . Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral Al_2(SO_3)_3 .

4. Here aluminium is having an oxidation state of +3 called as $Al^{3+}$ cation and anion is $PO_4^{3-}$ . Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral AlPO_4 .

Answer from: Quest

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

Answer from: Quest

what is the question here. i think you messed up.

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Write the formulas of the compounds formed by al3+ with the following anions: no3−, hco3−, so32−, p...