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marishachu [46]
3 years ago
8

1: Write the positive and negative ions that result when the following compounds are dissolved in an aqueous solution:

Chemistry
1 answer:
belka [17]3 years ago
7 0

Answer:

See explanation.

Explanation:

Hello there!

In this case, for the required chemical reactions, we proceed as follows, by considering that the left-handed elements stand for the cations and the right-handed ones for the anions:

1:

1. Na_2CO_3(aq)\rightarrow 2Na^+(aq)+(CO_3)^{2-}(aq)

2. FeBr_3(aq)\rightarrow Fe^{3+}(aq)+3Br^-(aq)

3. Al_2(SO_4)_3(aq)\rightarrow 2Al^{3+}(aq)+3(SO_4)^{2-}(aq)

2: In this case, we can represent the formula equation first according to the neutralization reaction:

3NaOH(aq)+H_3PO_4(aq)\rightarrow Na_3PO_4(aq)+3H_2O(l)

Which is worded as: three molecules of aqueous sodium hydroxide reacts with one molecule of aqueous phosphoric acid to yield one molecule of aqueous sodium chloride and three molecules of liquid water.

Regards!

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<u>Answer:</u> The longest wavelength of light is 656.5 nm

<u>Explanation:</u>

For the longest wavelength, the transition should be from n to n+1, where: n = lower energy level

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\frac{1}{\lambda }=1.096776\times 10^7m^{-1}\left(\frac{1}{2^2}-\frac{1}{3^2} \right )\\\\\lambda =\frac{1}{1.5233\times 10^6m^{-1}}=6.565\times 10^{-7}m

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