Hello!
It's actually easy to add a half drop of NaOH from the buret, you'll only need to be careful.
For doing that, you'll need to first open the flow of the buret until a little drop appears, and close it before it falls to the titrating flask. Then, you'll need to rinse the tip of the buret with deionized water to make the half drop fall into the titrating flask.
Don't worry about diluting your sample with the deionized water, since you are titrating the total moles of your analyte in the solution, and those won't change with concentration.
Have a nice day!
RbI means Rubidium Iodide
Answer: The molarity of the borax solution is 0.107 M
Explanation:
The neutralization reaction is:
According to neutralization law:
where,
= basicity of = 2
= acidity of borax = 2
= concentration of = 1.03 M
= concentration of borax =?
= volume of = 2.07ml
= volume of borax = 20.0 ml
Now put all the given values in the above law, we get the molarity of borax:
By solving the terms, we get :
Thus the molarity of the borax solution is 0.107 M
Answer:
Option C. Zn(s) + CoCI2(aq) —> ZnCl2 (aq) + Co(s)
Explanation:
The activity series of metals gives a clearer understanding of how metals displaces other metals in solution. Metals higher in the activity series will always displace those lower in the activity series.
Zinc, Zn is higher in the activity series than cobalt, Co. Therefore, zinc, Zn will displace cobalt, Co in any solution.
Considering the options given above, only option C. reflect the reaction and it is also balanced.
Zn(s) + CoCI2(aq) —> ZnCl2(aq) + Co(s)
Answer:
Hey mate....
Explanation:
This is ur answer....
<em>1) All matter is made of atoms. Atoms are indivisible and indestructible. </em><em>3) Compounds are formed by a combination of two or more different kinds of atoms. 4) A chemical reaction is a rearrangement of atoms.</em>
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