think about the reaction the $ceAgNO3$ and $ceHCl$. I check out that silver- chloride would be formed. But $ceH > ceAg$ in reactivity, climate how might $ceAg$ displace $ceH$ native $ceHCl$ ?

If there to be a reaction, $ceAgCl$ and $ceHNO3$ to be to form. However then these would react again to give us the original compounds back. The actual concern was to create down the reaction in between $ceAgNO3$ and $ceHCl$. I (wrongly) realized the the link wouldn"t react since 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 daunting parts that is learning to identify a kind of reaction based exclusively on its reactants. This has to be done prior to you can use a reaction pattern to the problem, and so that is an important to gain this step ideal in the beginning.

In this case, you room looking in ~ the reaction:

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

You already know the products, yet are questioning exactly how these commodities can it is in formed since the task of H is higher than Ag, implying that Ag is simpler to oxidize 보다 H. This is true - yet take a look at the oxidation numbers of each varieties in this reaction:

$ceAg: +1 -> +1$

$ceNO3: -1 -> -1$

$ceH: +1 -> +1$

$ceCl: -1 -> -1$

Since there is no in its entirety transfer that electrons, this can"t it is in a oxidization reaction, and also that means activities won"t issue here.

That means there have to be an additional driving force for this reaction - another reaction pattern that fits better.

I don"t want to provide you the prize directly, however I will provide you some 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 an additional reaction pattern the fits this equation better. Later, I"ll upgrade this price to present how you deserve to identify the correct pattern because that aqueous reactions using just the reactants.


As ns mentioned, one of the hardest components of is finding out to identify reaction fads based only on the reactants. This is a double-displacement (or metathesis, or precipitation) reaction. The is simple to see now, given that the reactants space aqueous and also at least one the the commodities is solid (the precipitate). Development of the heavy is the driving pressure for this reaction - the rapid explanation is the the forces attracting silver and also chloride ion together room stronger than the solvation forces in between those ions and also water, and also the pressures holding them to sodium and also nitrate ions.

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

The key is to have actually a great understanding the the 3 common types of salt/acid/base reaction that take place in aqueous solution, and also to find out to recognize hints in the reactants.

Briefly, the three species that space most frequently seen are:

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

You deserve to recognize each of this by the reaction if you understand what come look for.

Precipitation - 2 soluble salts (ionic compounds), or a salt with an mountain or base.

Acid/base - an Arrhenius acid and base (compound include hydroxide)

Redox - a salt or acid and an elemental metal

There are numerous other types of reactions that take place in aqueous solution, and many variations of the acid/base and redox category, yet these 3 cover the instances most generally seen in a classroom.

See more: Iron (Iii) Oxide Chemical Formula, Iron(Iii) Oxide

Once you have figured out the most likely pattern that the reaction will certainly follow, the following step is to predict the products using that pattern to check out if they make sense. If castle do, climate you have actually likely favored correctly.

You have the right to use this algorithm for more advanced also - in organic, because that example, one of the major goals is to discover to suspect reactions based on functional groups. When you deserve to identify useful groups and also have memorized reaction patterns for them, the becomes possible to predict a huge selection of reactions.