Explain how a light ray behaves when it strikes a mirror?
2 answers:
You might be interested in
Answer:
a) pH will be 12.398
b) pH will be 4.82.
Explanation:
a) The moles of NaOH added = molarity X volume (L) = 2 X 0.01 = 0.02 moles
The total volume after addition of pure water = 0.780+0.01 = 0.79 L
The new concentration of /NaOH will be:
the [OH⁻] = 0.025
pOH = -log [OH⁻] = 1.602
pH = 14 -pOH = 12.398
b) The buffer has butanoic acid and butanoate ion.
i) Before addition of NaOH the pH will be calculated using Henderson Hassalbalch's equation:
pKa=
ii) on addition of base the pH will increase.
Answer:
Maximum mass of produces=50.8g;
Explanation:
Firstly balance the chemical reaction,
Molecular weight of =334g/mole;
Molecular weight of CO =28g/mole;
Number of mole of given=80g/(334g/mole)=0.239mole;
Number of mole of CO given=28g/(28g/mole)=1 mole
Moles are:
Number of mole of =0.239
Number of mole of CO=1;
From the balanced equation,
1 mole of reacts with 5 moles of CO;
Hence;
0.239 mole of will react with 5*0.239 moles of CO means
Moles of CO that reacts with =1.2 mole but we have given 1 mole therefore
Will be excess reagent and CO will be the limitting reagent
And mass of product depends on limiting reagent i.e. mass of CO.
5 mole of CO produces 1 mole of
;
1 mole of CO produces 1/5 mole of ;
Maximum mass of produces=mole*molecular weight;
Molecular weight of =254g/mole;
Maximum mass of produces = (1/5)*254=50.8g;
Maximum mass of produces=50.8g;