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Ch.4 - Chemical Quantities & Aqueous Reactions

Chapter 4, Problem 77c

Write a molecular equation for the precipitation reaction that occurs (if any) when each pair of aqueous solutions is mixed. If no reaction occurs, write 'NO REACTION.' c. copper(II) nitrate and magnesium sulfide

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hey everyone. So we're as completely given precipitation reaction below. We have silver nitrate and study himself. I am asked to balance the molecular equation. So several nitrate is gonna be a G. And oh three. And it's gonna be a quiz because nitrates are soluble and then sodium sulfide is going to be in A to S. And this is also gonna be Aquarius Because sodium sulfide is assault. And since it contains a group one a elements it is soluble and this is a double displacement reaction. We have two compounds reacting so we can switch the ions and form new products. If we look at each reactant below You have a g. n. 0. 3 and it's going to dissociate into A. D. Plus And you know three And in a two s. Going to associate it's an A plus & S 2 -. Since we have to study. Um over here we can put a two in front of an A plus. So if we switch the ions we're gonna get a. D. Plus and S two minus reacting And this will give us AG two S. And it's going to be a solid because silver sulfide is insoluble because silver is a transition metal and most sulfide transition metals are highly insoluble. So the reaction will produce a precipitate of silver sulfide Then we're gonna have you know three minus in A plus and it's gonna give us in a in 03. And it's gonna be a quiz because nitrates are soluble. They're gonna have silver nitrate plus sodium sulfide And it's gonna give us silver cell five and sodium nitrate. We have a silver nitrate ion sodium and a sofa on both sides. So here we have one silver, one nitrate to sodium. I want to suffer. We have two silver over here, one nitrate, one sodium, and will suffer since we have to study non reactive side and only one on the product side. We can multiply by two over here, get to then I can put it in front of sodium nitrate. So now we're gonna have to nitrate over here. And since we have only one silver on the reactive side and two on the product side by two over here, get to And put a two in front of silver nitrate. So now the balance reaction is going to be too so overnight, right a quiz, study himself. Five. Hey chris And they showed silver cell five solid Plus two sodium nitrate a quiz. Thanks for watching my video and I hope it was helpful