the correct answer: 2Ca3(PO4)2 + 6SiO2 -> P4O10 + 6CaSiO3
The ball will float as it’s density is less than the salt water.
Solution :
Time (sec) Volume of NaOH (mL)
339 26.23
1242 27.80
2745 29.70
4546 3.81
39.81
Now the example of the first order kinetics w.r.t volumetric analysis is :

Here, 

= volume at time 0 = 0
Since the interval is not constant, we take the time interval as


= 1402.3333
≈ 1402 seconds


= 0.001643 x 0.52045
= 0.00082

Therefore, the first order rate constant is k
.
Explanation:
atom X
it is neutral
and may not exist independently
atom X+1
it is ion which has a charge on it positive or negative
it exists independently