The setup in the diagram is left outside during the day and night . Bubbles are continuously produced regardless of the presence
1 answer:
You might be interested in
Answer:
B and C
Explanation:
When we have to do a buffer solution we always have to choose the reaction that has the <u>pKa closer to the desired pH value</u>. When we find the pKa values we will obtain:
The closer value is pKa2 with a value of 7.2. Therefore we have to use the second reaction. In which is the <u>acid</u> and
is the <u>base</u>. Therefore the answer for the first question is B and the answer for the second question is C.
Answer:
We can have: Calcium, strontium, or barium
Explanation:
In this case, we have to remember the solubility rules for sulfate and the chloride
:
<u>Sulfate</u>
All sulfate salts are SOLUBLE-EXCEPT those also containing: Calcium, silver, mercury (I), strontium, barium or lead.(), which are NOT soluble.
<u>Chloride</u>
All chloride salts as SOLUBLE-EXCEPT those also containing: lead, silver, or mercury (I). (), which are NOT soluble.
If we the salt formed a precipitated with the sulfate anion, we will have as possibilities "Calcium, silver, mercury (I), strontium, barium or lead". If We dont have any precipitated with the Chloride anion we can discard "Silver, mercury (I), lead" and our possibilities are:
<u>"Calcium, strontium, or barium".</u>
I hope it helps!