Calculate the solubility of CuX in a solution that is 0.150 M in NaCN. Ksp for CuX is 1.27⨉10^-36.

Video transcript

Hello everyone in this video we're going to take a look and find the molars availability of ZN S and L I C N. So first the problem, we're given our ability product constant. So that's going to be our K. S. P. Of our Z N. S compound. And the product problem says that's going to be 2.00 times 10-25 power. Then we should also find the K F value of R Z n C N four And of course it has a 2 - charge. That constant is going to equal to 1.00 times to positive 18 power. This value can be found either in your textbook or given to your prayer professor. Alright, so let's go ahead and write the equilibrium equation for R Z and S compound. So we have Z and s and our equilibrium arrows. That's going to be our CN two plus, carry on Better. S 2 -. I know you then mixing in R C end. So we have our CN two plus with for most of our C N N N N. Again using our room eras, that's going to go ahead and create R N C and C N four. And again the two charge. Then next equation will have finally the C and S plus four. -. Without equilibrium eras have basically this again. And Our S two than our constant value is R K value. That's going to equal to We have our 2.00 times to -25. That's right over here, times this K. F. Value of 1.00 times 10 to the power multiplying our constance from here and here. Look at a total of 2.00 times 10. 3 -7 Power. Now we're gonna go ahead and draw our ice box, scroll down just a little bit. All right, so ice box we're going to go ahead and rewrite our equation right over here on top. Just scroll back up. So y'all can see. So right here in this dark pink color. So let's go ahead and write out our I. C. E. And then top wheel right out our equation. So we have our Z. N. S. That's going to be our solid. We're adding in our four C. And minus the equilibrium eras. Then we'll have our C. N. C. N four two minus. And let me just go ahead and move some stuff here so we have some room. Alright, continuing the equation. We'll just have the S 2 - an eye on. Alright so here since we have a solid we know all those values are just going to be and A N. A. And and basically just like that feeling in our values zero point 167 negative four X. The toll of these two. We don't know our X. Value so we can just Only right 1. - R4 X. Over here we have zero as our initial then we don't know from here. Same thing with our other product zero and we don't know. All right now sorry for that K. Value. Then formula is not playing R S E n C N four two minus mm. The concentration and the S two annoying us. It's all going to be divided by R. C N minus to day four. If we plug in those values you can see we get 2.00 times 10 to the -7. That's what issue equal to like. So then plugging in the values from ice box then into these here. So what we can on X. The next because we do not know divided by Our 0.967 -4 X. to the floor. And again that's going to equal to this value. That's what we had here. 2.00 times 10 to just fix this a little bit Times 10 to the -7. Again scrolling down just a little bit. All right. And so you can see that our 0. divided by R 2.00 times 10 to the -7. It's going to be much much Biggest than our 500. And therefore we can say that the four x. Is a very small value. Again scrolling down just a little bit more. Then we continue the math here and see that our value right here is equal to 2.00 times 10 to the -7. It's going to be multiplied by our value here, 0.16 seven to the fourth. Before I put this in my calculator, I'll just go ahead and square root isolate this by itself. So square root again. Just put all this into my square root. Right now. Put all this into mike out there. Get 1.247 to just go ahead, stop there. I'm 10 to the negative five now, making sure we have the correct amount of sick fix. We'll go ahead and stop the count here and round up since we have a seven here, So s equals 1.25 Times 10 to date they're gonna five. And our final answer is going to be this value right here. Alright. And that's going to be how we saw for the solar cell viability of Z N. S and L I C N. Thank you all so much for watching