Answer:
![Ca^{+2}=5.13x10^{-3}M\\SO_4^{-2}=0.010 M](https://tex.z-dn.net/?f=Ca%5E%7B%2B2%7D%3D5.13x10%5E%7B-3%7DM%5C%5CSO_4%5E%7B-2%7D%3D0.010%20M)
Explanation:
Hello,
At first, the answer is wrong, consider the following procedure:
- the pKs, leads to a Ks of:
![pKs=-Log(Ks)](https://tex.z-dn.net/?f=pKs%3D-Log%28Ks%29)
![Ks=10^{-4.58}=2.63x10^{-5}](https://tex.z-dn.net/?f=Ks%3D10%5E%7B-4.58%7D%3D2.63x10%5E%7B-5%7D)
- now, stating the equilibrium for the calcium sulfate (whereas x is the change during the equilibrium):
![Ks=[Ca^{+2}]^{eq}[SO_{4}^{-2}]^{eq}\\Ks=[x]^{eq}[x]^{eq}\\Ks=x^{2}\\x=\sqrt{2.63x10^{-5}}\\x=5.13x10^{-3} M](https://tex.z-dn.net/?f=Ks%3D%5BCa%5E%7B%2B2%7D%5D%5E%7Beq%7D%5BSO_%7B4%7D%5E%7B-2%7D%5D%5E%7Beq%7D%5C%5CKs%3D%5Bx%5D%5E%7Beq%7D%5Bx%5D%5E%7Beq%7D%5C%5CKs%3Dx%5E%7B2%7D%5C%5Cx%3D%5Csqrt%7B2.63x10%5E%7B-5%7D%7D%5C%5Cx%3D5.13x10%5E%7B-3%7D%20M)
- x becomes the concentration of calcium ions and one of the contributions for the total concentration of sulfate ions, thus:
![[Ca^{+2}]^{eq}=5.13x10^{-3} M](https://tex.z-dn.net/?f=%5BCa%5E%7B%2B2%7D%5D%5E%7Beq%7D%3D5.13x10%5E%7B-3%7D%20M)
- finally, since the sodium sulfate is totally dissolved, we just simply add its concentration (equal to the sulfate ions yielded by itself) to the outgoing sulfate concentration from the calcium sulfate:
![[SO_4^{-2}]^{total}=5x10^{-3}M+5.13x10^{-3}M\\[SO_4^{-2}]^{total}=0.010 M](https://tex.z-dn.net/?f=%5BSO_4%5E%7B-2%7D%5D%5E%7Btotal%7D%3D5x10%5E%7B-3%7DM%2B5.13x10%5E%7B-3%7DM%5C%5C%5BSO_4%5E%7B-2%7D%5D%5E%7Btotal%7D%3D0.010%20M)
Bibliography:https://books.google.com.co/books?id=LQwyfFc3pXsC&lpg=PA243&ots=zIJN3nSFWE&dq=pKs%20chemistry&pg=PA244#v=onepage&q=pKs%20chemistry&f=false page 243
Best regards!
Molecules huddle close together.
cannot form to any shape.
Answer:
A line can be lyrically defined as a point in motion. ... They help determine the motion, direction and energy in a work of art. We see line all around us in our daily lives; telephone wires, tree branches, jet contrails and winding roads are just a few examples.
Answer:
The correct option is 3. No, because atoms are not rearranged to create new substances.
Explanation:
A chemical reaction can be described as a reaction in which reactants combine to form new products. For example, the burning of wood is a chemical reaction.
A physical reaction can be described as the one in which no new products are made. The state of a substance might change from one form to another but no new substance is made. For example, the changing of the state of ice water into liquid water. A new product is not formed in this reaction hence, it is not a chemical reaction.
<span>Fe(OH)3(S) +3HNO3(aq)----->Fe(NO3)3(aq) + 3H20(aq)
M(Fe(OH)3)=56+48+3=107; M(HNO3)= 48+14+1=63
n(Fe(OH)3)=5.4/107=0.05; n(HNO3)=2.6/63=0.04
n(Fe(OH)3):n(HNO3)=1:3, which means that the HNO3 should be three times (molar) than the Fe(OH)3, but you can see that it is, actually, even less than the Fe(OH)3, meaning that HNO3 is the limiting reagent and the amount of Fe(OH)3 which is going to react with HNO3 is 0.04/3=0.013 i.e. 0.05-0.013=0.037 mol Fe(OH)3 is left after the completion.
Just in case you can convert it into mass, but I suppose this is enough.</span>