KCL that is contaminated with calcium chlorate (Ca(ClO3)2) is heat in a tube. wat is the % weight of...?

The test tube is heated prompting the reaction:

_Ca(ClO3)2 (s) + _KCl(s) --> _CaCl2(s) + _O2(g) + _KCl(s)

Data during experiment:

Mass of test tube: 7.918g

Mass of mixture (KCl/Ca(ClO3)2) + tube : 19.164g

Mass of residue (KCl/Ca(CaCl2) + tube after heating: 18.635

How do I find the % weight of Ca from (KCl/Ca(ClO3)2)?

and % weight of KCl in original mixture?

Ca: 40.08 g/mol

ClO3: 83.45 g/mol

K: 39.1 g/mol

Cl: 35.45 g/mol

O2: 32.00 g/mol

Relevance
• Dr.A
Lv 7

Ca(ClO3)2 + KCl = CaCl2 + 3 O2 + KCl

mass mixture KCl / Ca(ClO3)2 = 19.164 - 7.918=11.246 g

mass KCl/Ca(ClO3)2 after heating = 18.635 - 7.918 =10.717 g

11.246 - 10.717 =0.529 g = mass O2 lost in the decomposition of Ca(ClO3)2

moles O2 = 0.529 / 31.998 g/mol=0.0165

the ratio between Ca(ClO3)2 and O2 is 1 : 3

moles Ca(ClO2)2 = 0.0165 x 1 /3=0.00550

= moles Ca

mass Ca = 0.00550 x 40.08 g/mol=0.220 g

% Ca = 0.220 x 100/11.246 =1.96

mass Ca(ClO3)2 = 0.00550 mol x 206.98 g/mol=1.14 g

mass KCl = 11.246 - 1.14 =10.1 g

% KCl = 10.1 x 100/ 11.246 =89.9

• 4 years ago

you decide on a serious answer, not one that strokes your ego or tells you what you % to take heed to? examine on... there is no rapid way. Your physique will in straightforward terms have began to conform to a sparkling dietary plan after approximately 2 weeks. some people would adventure a physique composition progression in this time, maximum won't. you spot, your metabolism is almost a loaded freight prepare. it relatively is going finished-velocity forward in despite course you have set it. in case you % to alter it relatively is course, it takes plenty extra suitable than only hitting the e-brake, flipping on a dime and taking photographs off interior the recent course. It has slowly grind to a halt, floor the engine in opposite, and slowly, yet relatively you will start up moving in a sparkling course. perhaps that's a foul analogy, yet you get the factor. Metabolic alterations take place over the years. And physique composition progression (a minimum of interior the healthful, everlasting, lean, toned, sexy sense), is a protracted-term objective. great bodies are actually not gained in one day. they are stressful-earned and maintained with reliable, sound food, supplementation, familiar weight-education, cardiovascular workout, and strong relax. initiate now, with the aid of fact it takes time to get a robust ordinary down. that's a existence-type substitute, there is no rapid restoration that sticks.