Answer:
pH = 11.37
Explanation:
Sodium cyanide will dissociate into sodium ion and cyanide ion. This cyanide ion will get hydrolyzed.The ICE table for hydrolysis of cyanide ion is:
Initial 0.265 0 0
Change -x +x +x
Equilibrium 0.265-x x x
This K is Kb of HCN
Kb = Kw / Ka
Putting values
x can be ignored in denominator as Kb is very low
x= 2.33X10⁻³ M = [OH⁻]
pOH = -log[OH⁻]
pOH = -log(2.33X10⁻³ )
pOH = 2.63
pH = 14- pOH = 14-2.63 = 11.37
Answer:
0.35moles
Explanation:
when 156g of Al reacts with 2molesof Al2O3 then 27g of Al reacts with what then u cross multiply and solve ur answer
Answer:
meth
Explanation:
YOu get chemicals and mix them together yes you do
<span>C. It is in the row below and therefore more reactive </span>
Al
Na
S
O
Br
Ca
Explanation:
The atomic radius is taken as the half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements. It is also the half - distance between two nuclei in the solid state of metals.
Across a period on the periodic table, atomic radii decreases due to increase in the nuclear charge without an attendant increase in the number of electronic shells.
Down a group atomic radii increases due to successive shells of electrons being added.
a. Al or B : down a group III, so aluminium is larger
b. Na or AI
: across a period so Na is larger
c. S or o
: down group VI so sulfur is larger
d. O or F
: across a period so oxygen is larger
e. Br or CI
: down a group VII so Br is larger
f. Mg or Ca: down a group II so Ca is larger
Learn more:
Atomic radius brainly.com/question/5048216
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