think about the reaction the $ceAgNO3$ and $ceHCl$. I review that silver chloride would certainly be formed. Yet $ceH > ceAg$ in reactivity, climate how could $ceAg$ displace $ceH$ native $ceHCl$ ?

If there to be a reaction, $ceAgCl$ and $ceHNO3$ were to form. However then these would react again to provide us the initial compounds back. The actual inquiry was to write down the reaction in between $ceAgNO3$ and also $ceHCl$. Ns (wrongly) realized that the link wouldn"t react because of the factors stated.

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edited Feb 25 "18 in ~ 7:33

Gaurang Tandon
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One the the most an overwhelming parts of is discovering to identify a form of reaction based specifically on its reactants. This needs to be done before you can use a reaction sample to the problem, and so that is critical to obtain this step appropriate in the beginning.

In this case, you room looking at the reaction:

$$ceAgNO3 + HCl -> AgCl + HNO3$$

You already know the products, however are questioning how these products can be formed since the activity of H is better than Ag, implying the Ag is much easier to oxidize than H. This is true - yet take a look at the oxidation number of each types in this reaction:

$ceAg: +1 -> +1$

$ceNO3: -1 -> -1$

$ceH: +1 -> +1$

$ceCl: -1 -> -1$

Since there is no overall transfer the electrons, this can"t be a oxidation reaction, and that way activities won"t matter here.

That way there need to be an additional driving force for this reaction - one more reaction pattern that fits better.

I don"t desire to provide you the prize directly, yet I will provide you part advice that must help:

Write the complete equation - including the phases.

$$ceAgNO3(aq) + HCl(aq) -> AgCl(s) + HNO3(aq)$$

See if you deserve to find one more reaction pattern that fits this equation better. Later, I"ll update this prize to show how you can identify the correct pattern because that aqueous reactions using only the reactants.


As i mentioned, one of the hardest parts of is discovering to identify reaction trends based only on the reactants. This is a double-displacement (or metathesis, or precipitation) reaction. The is straightforward to watch now, given that the reactants room aqueous and also at least one of the commodities is heavy (the precipitate). Development of the heavy is the driving force for this reaction - the rapid explanation is that the pressures attracting silver and chloride ion together space stronger 보다 the solvation forces between those ions and also water, as well as the pressures holding them come sodium and nitrate ions.

This is good, yet how do we predict the this is a precipitation reaction front of time?

The crucial is to have actually a good understanding the the 3 common varieties of salt/acid/base reaction that occur in aqueous solution, and also to discover to recognize ideas in the reactants.

Briefly, the three species that room most generally seen are:

PrecipitationAcid/base (Arrhenius definition)Redox (single displacement)

You have the right to recognize every of these by the reaction if you know what to look for.

Precipitation - two soluble salts (ionic compounds), or a salt through an mountain or base.

Acid/base - one Arrhenius acid and basic (compound containing hydroxide)

Redox - a salt or acid and also an elemental metal

There are countless other species of reactions that occur in aqueous solution, and many variations of the acid/base and redox category, yet these three cover the instances most frequently seen in a classroom.

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Once you have figured out the most likely pattern that the reaction will follow, the next step is to predict the commodities using that pattern to watch if they do sense. If castle do, climate you have actually likely chosen correctly.

You have the right to use this algorithm for an ext advanced too - in organic, for example, one of the major goals is to find out to predict reactions based upon functional groups. As soon as you have the right to identify practical groups and also have memorized reaction patterns for them, the becomes possible to predict a huge range of reactions.