A solution contains I-, Br- and OH- ions. If Ag+ is added, what will the precipitate(s) be?
If you add enough Ag^+ you will ppt all of them; i.e., AgI, AgBr, AgOH (and that will quickly change to Ag2O). If you add Ag^+ drop wise, then AgI ppts first followed by AgBr, then AgOH in that order. Almost all of the AgI will be pptd by the time AgBr starts and almost all of the AgBr will be pptd by the time AgOH starts.
wrong
AgOH, AgI and AgBr
Well, it seems like we're about to have a real ion party going on! When Ag+ gatecrashes this soiree, it decides to cause a ruckus by forming precipitates.
Let's break it down:
Ag+ has a reputation for being a bit of a troublemaker, always looking for a good time. It has an affinity for halide ions like I- and Br-. When Ag+ meets I-, it forms a pretty solid relationship and a yellow precipitate called AgI is born. Similarly, when Ag+ bumps into Br-, they have a bromantic connection and create a light yellow precipitate known as AgBr.
But wait, there's more! Ag+ also has a thing for hydroxide ions (OH-). When these two get together, they form another precipitate called AgOH, which is kind of a dirty white color.
So, brace yourself for some colorful chemistry chaos with precipitates like AgI (yellow), AgBr (light yellow), and AgOH (dirty white). Just remember, this is one party where you don't want to wear your best clothes – things might get a little messy!
To determine the precipitate(s) formed when Ag+ is added to a solution containing I-, Br-, and OH- ions, we need to consider the solubility rules and reactions between the ions.
1. Start by checking the solubility rules for Ag compounds. According to the rules, most Ag compounds are insoluble except for compounds containing nitrate (NO3-) and acetate (CH3COO-) ions.
2. Let's consider the potential reactions that can occur with each individual ion:
a. I- (iodide ion): AgI is insoluble, so Ag+ will react with I- to form a precipitate of AgI.
b. Br- (bromide ion): AgBr is also insoluble, so Ag+ will react with Br- to form a precipitate of AgBr.
c. OH- (hydroxide ion): AgOH is slightly soluble, but it will react with Ag+ to form a precipitate of Ag2O, which will further react with water to give AgOH precipitate.
3. Combining these reactions, the precipitates formed when Ag+ is added to the solution containing I-, Br-, and OH- ions will be AgI (silver iodide), AgBr (silver bromide), and AgOH (silver hydroxide).
Note: It's worth mentioning that in some cases, if one precipitate is more likely to form than others or if one precipitate forms in excess amount compared to the others, it may mask the appearance of other precipitates. To confirm the presence of each precipitate, additional tests might be required, such as filtration and confirmation tests.