11. An iron (Fe) wire with 5.00 cm in tength was dropped into 850 0 ml. 2375 M H

Question

11. An iron (Fe) wire with 5.00 cm in tength was dropped into 850 0 ml. 2375 M HC Ate reacted completely with HCIO, to produce irondll) perchloratec and hydrogen gas ( , the solation was te the remaining HCIO, by NaOH solution 258.9 ml.of 0 8413 M NaOit solotion was nocded f (a) (2 points) What is the reaction equation between Fe and HC1O (b) (1 point) What is the reaction equation between HCIO,and N (e) (0 point) What is the net ionic reaction equation between HCO,and Nao (d) (1t points) If you consider the iron wirc as a cy linder, what io the radius in mn of ron wirc The de of iron is 7.87 g/em The area of a circle with r as radius is a

Explanation / Answer

(a) Fe(s) + HClO4(aq) --> Fe(ClO4)2 (aq) + H2(g)

(b) HClO4(aq) + NaOH(aq) --> NaClO4(aq) + H2O(l)

(c) H+(aq) + OH-(aq) --> H2O(l)

(d) volume V = hr2

r = square root of (V / ( x h))

h = 5 cm; = 3.14, r ---> radius; 1cm = 10 mm; density = 7.87 g/cm3 for 1g V= 7.87 cm3

r = (7.87 cm3 / (3.14 x 5 cm))1/2

r = 0.71 cm = 7.1 mm

iron wire radius = 7.1 mm

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