Explanation:
1 grams Gallium to mol = 0.01434 mol
10 grams Gallium to mol = 0.14342 mol
20 grams Gallium to mol = 0.28685 mol
30 grams Gallium to mol = 0.43027 mol
40 grams Gallium to mol = 0.5737 mol
50 grams Gallium to mol = 0.71712 mol
100 grams Gallium to mol = 1.43425 mol
200 grams Gallium to mol = 2.86849 mol
2-bromo-1-chloro-4-nitrobenzene is being synthesized in following sequence:
Step 1: Chlorination of Benzene:
This is Halogenation reaction of benzene. In this step benzene is reacted with Chlorine gas in the presence of lewis acid (i.e. FeCl₃). This results in the formation of Chlorobenzene as shown in red step below.
Step 2: Nitration of Chlorobenzene:
The chlorine atom on benzene has a ortho para directing effect. Therefore, the nitration of chlorobenzene will yield para nitro chlorobenzene as shown in blue step below.
Step 3: Bromination of 1-chloro-4-nitrobenzene:
In this step bromination is done by reacting bromine in the presence of lewis acid. The chlorine being ortho para directing in nature and nitro group being meta directing in nature will direct the incoming Br⁺ (electrophile) to the desired location. Hence, 2-bromo-1-chloro-4-nitrobenzene is synthesized in good yield.
Answer:
The correct answer is 2.1
Explanation:
The neutralization reaction involved in the titration is between a strong acid (HCl) and a strong base (NaOH), as follows:
HCl + NaOH → NaCl + H₂O
According to this, 1 equivalent of HCl reacts with 1 equivalent of NaOH. The equivalence point is the point at which the amount of NaOH added reacted completely with the amount of HCl.
moles of acid = moles of base
moles HCl = moles NaOH
Ca x Va = Cb x Vb
Ca = (Cb x Vb)/Va = (0.16 M x 17 mL)/(350 mL) = 7.8 x 10⁻³ M
Since HCl is a strong acid, we calculate the pH of the solution directly from the concentration of acid:
[H⁺]= Ca = 7.8 x 10⁻³ M
pH = -log [H⁺] = -log (7.8 x 10⁻³ M) = 2.11
Therefore, the pH of the HCl solution is 2.1