When iron hydroxide dissolves, it dissociates as follows
Fe(OH)₂ --> Fe²⁺ + 2OH⁻
molar solubility is the number of moles of solute that can be dissolved is a 1 L solution
if molar solubility of Fe(OH)₂ is x then molar solubility of Fe²⁺ is x and OH⁻ is 2x
the solubility product constant - ksp formula is ;
ksp = [Fe²⁺][OH⁻]²
ksp = (x)(2x)²
ksp = x * 4x²
ksp = 4x³
ksp = 4.87 x 10⁻¹⁷
4x³ = 4.87 x 10⁻¹⁷
x = 2.30 x 10⁻⁶ M
molar solubility of Fe(OH)₂ is 2.30 x 10⁻⁶ M
Answer:
HCL being a strong electrolyte dissociates in water to give H+ and Cl- ions. KMnO4 being a strong oxidising agent oxidises Chloride ion(Cl-) to Cl2. ... Hence more amount of KMnO4 is usedup which results in error in reading. The situation is completely the opposite with K2Cr2O7.
hope this helps
Answer:- 4.35 kg of ammonium perchlorate are required for every kg of Al.
Solution:- It's a stoichiometry problem. The balanced equation for this problem is....

From balanced equation, there is 3:3 that is 1:1 mol ratio between aluminum and ammonium perchlorate.
Given mass of Al is 1 kg and we are asked to calculate the mass of ammonium perchlorate for it.
Molar mass of Al is 26.98 g/mol and molar mass of ammonium perchlorate is 117.49 g/mol.
1 kg = 1000 g
Grams of Al are converted to moles and then moles of ammonium perchlorate are calculated using mol ratio and finally on multiplying with molar mass we get the mass of ammonium perchlorate.
1000 g Al x (1mol Al/26.98 g Al) (1mol ammonium perchlorate/1mol Al) (117.49 g ammonium perchlorate/1mol ammonium perchlorate)
= 4354.7 g that is 4.35 kg of ammonium perchlorate
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