Blue nuclear leakage of medical equipment

(1) I 127 and I 13 1 have the same number of protons but different numbers of neutrons, so they belong to isotopes. Each iodine tablet contains iodine 100 mg, while the iodine content per kilogram of edible salt is 20 mg, so people should eat 100 mg of salt every day.

So the answer is: neutron number; 5; None;

(2) To prepare KIO3 by electrolysis, the anode undergoes oxidation reaction, the electrode reaction formula is I-+3H2O-6e-=IO3-+6H+, and the cathode reaction formula is 2H2O+2e-=H2↑+2OH-, and the cathode PH increases.

So the answer is: I-+3H2O-6e-= IO3-+6h+; Increase;

(3)①IO3- is oxidizing, and reacts with reducing I- to generate I2 under acidic conditions, and the ionic equation of the reaction is IO3-+5I-+6H+=3I2+3H2O.

So the answer is: io3-+5i-+6h+= 3i2+3H2O;

② According to the reaction IO3-+5I-+6H+=3I2+3H2O, I2+2S2O32- (colorless) →2I-+S4O62- (colorless), the reaction relations IO3-~ 3 I2 ~ 6s2o 32- were obtained.

n(na 2 S2 o 3)= 0.0 10mol/l×0.0 12l = 0.000 12mol，

Then io3-~ 3i2 ~ 6s2o32-

1? six

n(IO3-)？ 0.00012mol

N(IO3-)= 0.00002 mol,

m(KIO 3)= 0.00002mol×2 14g/mol = 0.00428g = 4.28mg，

Therefore, in 1kg salt, m (kio3) =10× 4.28mg = 42.8mg,

Where m (I) = 42.8 mg×127214 = 25.4 mg > 20 mg,

So it can be judged that the salt is qualified.

So the answer is: 42.8; Qualified.