Answer:
B
Explanation:
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50 degrees, the angle of incident is always equal to the angle of reflection
A) MgCl₂(aq)+Na₂CO₃(aq)→MgCO₃(s)+2NaCl(aq)
b) double replacement reaction
c) Yes, Magnesium carbonate forms.
I hope this helps. Let me know if anything is unclear.
Answer:
Explanation:
Hello,
At first, the answer is wrong, consider the following procedure:
- the pKs, leads to a Ks of:
- now, stating the equilibrium for the calcium sulfate (whereas x is the change during the equilibrium):
- x becomes the concentration of calcium ions and one of the contributions for the total concentration of sulfate ions, thus:
- 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:
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
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