It should be B. All of the other choices are used often by abusers
Answer:
Explanation:
Initial burette reading = 1.81 mL
final burette reading = 39.7 mL
volume of NaOH used = 39.7 - 1.81 = 37.89 mL .
37.89 mL of .1029 M NaOH is used to neutralise triprotic acid
No of moles contained by 37.89 mL of .1029 M NaOH
= .03789 x .1029 moles
= 3.89 x 10⁻³ moles
Since acid is triprotic , its equivalent weight = molecular weight / 3
No of moles of triprotic acid = 3.89 x 10⁻³ / 3
= 1.30 x 10⁻³ moles .
Iron (III) chloride catalyzes the decomposition of hydrogen peroxide because the decomposition of hydrogen peroxide is usually inhibited by the presence of ions such as phosphate ions in solution. The iron ions that would result from the dissolution of iron (III) chloride have a charge of 3+ and would bond with the -3 charged phosphate ions, creating a non-charged FePO4 molecule and removing the decomposition inhibitor from the solution. Potassium iodide and potassium chloride both are more strongly bonded than a transition metal compound and would lack the necessary charged iron ion when added to hydrogen peroxide.
1. Acetic acid (Ethanoic acid) is a colorless liquid.
2. Sodium Bicarbonate is an odorless, crystalline powder.
3. Carbon dioxide is a colorless gas.
4. Dihydrogen monoxide is colorless and odorless gas.
5. Sodium acetate is very soluble in water.
6. Calcium chloride has an exothermic reaction when dissolved in water.
7. Calcium carbonate is also an odorless powder.
8. Sodium chloride is soluble in water, and partially soluble (or insoluble) in other liquids.
Hope this helps! (:
