A sample of limestone (containing calcium carbonate, CaCO3) weighing 438 mg is treated with oxalic acid, H2C2O4,
Question:
CaCO3(s) + H2C2O4(aq) → CaC2O4(s) + H2O(l) + CO2(g)
The mass of the calcium oxalate produced is 472 mg. What is the mass percentage of calcium carbonate in this limestone?
Step by Step Answer:
For g CaCO 3 use this equation CaCO 3 H 2 C 2 O 4 CaC 2 ...View the full answer
Related Video
The experiment aims to show the impact of various beverages on teeth by using eggs as a representation of enamel. Three eggs are boiled and then placed in glasses filled with fizzy drinks, vinegar, and mango juice for 24 hours. The shells of eggs are similar to enamel as they are composed of calcium carbonate, and enamel is primarily made of calcium phosphate. The eggs are then observed to demonstrate the effects of the different liquids on teeth and the importance of brushing regularly. The egg placed in fizzy drink has turned dark in color but can be cleaned by brushing with toothpaste and rinsing with water. The egg placed in vinegar has had its shell softened due to the chemical reaction of vinegar and calcium carbonate, which can\'t be reversed. This highlights the fact that acids are more damaging to teeth than other substances. The egg placed in mango juice represents the process of bacteria in the mouth converting sugars and starches into acids that form plaque, which can be prevented by brushing. The use of fluoride in toothpaste is also highlighted as it slows down the demineralization process and protects the enamel. The importance of brushing teeth twice a day is emphasized.
Students also viewed these Organic Chemistry questions
-
You are given a sample of limestone, which is mostly CaCO3, to determine the mass percentage of Ca in the rock. You dissolve the limestone in hydrochloric acid, which gives a solution of calcium...
-
A sample of limestone was dissolved in hydrochloric acid, and the carbon dioxide gas that evolved was collected. If a 0.1662-g sample of limestone gave 34.56 mL of dry carbon dioxide gas at 745 mmHg...
-
Limestone (calcium carbonate) particles are stored in 50-L bags. The void fraction of the particulate matter is 0.30 (liter of void space per liter of total volume) and the specific gravity of solid...
-
What is the Antebellum Interregional growth hypothesis?
-
You are on an engagement to provide an integrated audit on the financial statements of Carsons Orthopedic Shoes. This company is a small-size online retailer that sells custom shoes to the public....
-
If Gross Profit is 20,000 and closing inventory is 35,000, purchases are 100,000 and sales were 200,000, what is the value of opening inventory?
-
An engine is used on a job requiring \(110 \mathrm{~kW}\) BP. The mechanical efficiency of the engine is \(80 \%\) and engine consumes \(50 \mathrm{~kg} / \mathrm{hr}\) of fuel. A design improvement...
-
Marcia Saxton worked for Jerry Richardson, a supervisor at AT&Ts International Division. Richardson made advances to Saxton on two occasions over a three-week period. Each time Saxton told him she...
-
Mike Scott was a high school graduate who worked as a receptionist in the corporate offices of a large corporation. Scott had no particular plans for his career development; However, he wanted to...
-
Given a database of the results of an election, find the number of seats won by each party. There are some rules to going about this: There are many constituencies in a state and many candidates who...
-
Aniline, a starting compound for urethane plastic foams, consists of C, H, and N. Combustion of such compounds yields CO2, H2O, and N2 as products. If the combustion of 9.71 mg of aniline yields 6.63...
-
A titanium ore contains rutile (TiO2) plus some iron oxide and silica. When it is heated with carbon in the presence of chlorine, titanium tetrachloride, TiCl4, is formed. TiO2(s) + C(s) + 2Cl2(g) ...
-
Verify the alternative formulas for computing \(S S T\) and \(S S(T r)\) given on page 399 . Data From Page 399 k ni SST=-C i=1 j=1 k SS(Tr) = ni i=1 where C, called the correction term for the mean,...
-
Sheldon Cooper has $40,000 to invest for 10 years. He wants to double his money in that time. Using the rule of 72, calculate the rate hell need to earn to achieve that goal.
-
Simone frequently downloads mobile apps from Amazon Appstore. What operating system does she have on her smartphone?
-
1. What does the Morning Star formation indicate? 2. What do the Bollinger Bands measure?
-
1. (a) Determine a parametrization (t) of the curve defined by the intersection of the surfaces z=x+ y and z = 5. V (b) Write an equation of the tangent line to r(t) (from part (a)) at the point...
-
Jason has created a risk register for his organization and regularly updates it with input from managers and senior leadership throughout the organization. What purpose does this serve?
-
In designing musical instruments, the equation arises for the frequency of vibration of strings. Write this equation with a rationalized denominator. f = T V4L
-
Determine two different Hamilton circuits in each of the following graphs. A B F G
-
The decomposition of ozone, O 3 , to oxygen, O 2 , is an exothermic reaction. What is the sign of q? If you were to touch a flask in which ozone is decomposing to oxygen, would you expect the flask...
-
A car whose mass is 5.30 10 3 lb is traveling at a speed of 57 miles per hour. What is the kinetic energy of the car in joules? in calories?
-
Hydrogen sulfide, H 2 S, is produced during decomposition of organic matter. When 0.5000 mol H 2 S burns to produce SO 2 (g) and H 2 O(l), 281.0 kJ of heat is released. What is this heat in...
-
Salmon ASA has just issued a callable seven-year, 8% coupon bond with coupon payable annually. The bond can be called at par in two years or anytime thereafter on a coupon payment date. It has a...
-
Lamda corporation wants to acquire another company within its industry for $100m and it expects the acquisition to contribute to its free cash flow by $5m the first year, and this contribution is...
-
Dewan INC. has several divisions, each with a manager responsible for the operations of the division. Each division of Dewan controls product design, sales, pricing, operating costs, and profits.....
Study smarter with the SolutionInn App