rodolfoperezzz1332
19.05.2020 •
Chemistry
If 203 ML of water is added to 5.00 ML of 4.16 MKCI solution what is the concentration of the diluted solution
Solved
Show answers
More tips
- H Health and Medicine Reasons for the Appearance of Warts: Everything You Need to Know...
- G Goods and services What Are the Most Popular Services?...
- O Other What is the oldest joke ever told?...
- L Legal consultation How to Properly Inherit: Tips and Recommendations...
- C Computers and Internet Boost your processor performance with these easy tips...
- S Sport How does Bodyflex work: what is it and how does it work?...
- H Health and Medicine How to Whiten Teeth and Get the Perfect Smile...
- S Style and Beauty How to Properly Apply Eye Makeup: Tips from a Professional Makeup Artist...
- A Auto and Moto How Can Parking Sensors Help Drivers?...
- C Computers and Internet Make Money Online: Secrets and Essential Ways...
Answers on questions: Chemistry
- C Chemistry In the reaction Mg(s) + Br2() → MgBrz(s), what should be the coefficient for Br2? A. 2 B. 4 C. 1 D. 3...
- C Chemistry 1.) Which of the following is an exact measurement? 1000 bikes 22 3 cm 453.6 Celcius...
- C Chemistry In polymerization complex molecules are formed by the joining together of...
- C Chemistry What name is given to the reactants in an enzymatically catalyzed reaction?...
- C Chemistry What name is given to the bond between water molecules?...
- C Chemistry What will happen to an unstable nucleus of radium-226?...
- C Chemistry Consider the densities of copper (8.96) and sulfur (2.07) , explain why 2 grams of copper takes up much less space than only 1 gram of sulfur....
- C Chemistry Describe how the periodic table differentiates between metals and nonmetals. i need a very informative description/explanation on this....
- C Chemistry Which of the following compounds is not ionic? a. nai b. cacl2 c. co2 d. na2o...
- C Chemistry What is the most appropriate si (metric) unit for measuring the length of an automobile?...
Ответ:
The answer to your question is below
Explanation:
Data
mass of CaCO₃ = 155 g
mass of HCl = 250 g
mass of CaCl₂ = 142 g
reactants = CaCO₃ + HCl
products = CaCl₂ + CO₂ + H₂O
1.- Balanced chemical reaction
CaCO₃ + 2HCl ⇒ CaCl₂ + CO₂ + H₂O
2.- Limiting reactant
molar mass of CaCO₃ = 40 + 12 + 48 = 100 g
molar mass of HCl = 2[1 + 35.5 ] = 73 g
theoretical proportion CaCO₃ /HCl = 100 / 73 = 1.37
experimental proportion CaCO₃ /HCl = 155 / 250 = 0.62
As the experimental proportion was lower than the theoretical proportion the limiting reactant is CaCO₃
3.-
Calculate the molar mass of CaCl₂
CaCl₂ = 40 + 71 = 111 g
100 g of CaCO₃ 111 g of CaCl₂
155 g of CaCO₃ x
x = (155 x 111) / 100
x = 17205 / 100
x = 172.05 g of CaCl₂
4.- percent yield
Percent yield = 142 / 172.05 x 100 = 82.5 %
5.- Excess reactant
100 g of CaCO₃ 73 g of HCl
155 g of caCO₃ x
x = (155 x 73)/100
x = 133.15 g
Mass of HCl = 250 - 133.15
= 136.9 g