Why is calcium carbonate more stable than magnesium carbonate?
Why is CaCO3 more thermally stable than MgCO3? Since CaCO3 has more similar ionic radii than MgCO3, CaCO3 is more stable and takes more energy to decompose.
What is the temperature required for decomposition of calcium carbonate?
between 700 °C and 800 °C
What happens when calcium carbonate reacts with hydrochloric acid?
1. When calcium carbonate reacts with hydrochloric acid, carbon dioxide gas is produced. A convenient way of following the reaction is to place a flask containing the reactants on a chemical balance and follow the mass of the apparatus with time. As carbon dioxide escapes from the flask it loses mass.
What could be done to increase the rate of decomposition of CaCO3?
Therefore, if CO2 is removed then the equilibrium will shift to the right towards the products thereby increasing the rate of decomposition of CaCO3.
What happens to calcium carbonate when heated?
When limestone is heated in a kiln, the calcium carbonate breaks down into calcium oxide and carbon dioxide. This type of reaction is called thermal decomposition. Quicklime reacts with water to produce calcium hydroxide, which is also called slaked lime.
What type of chemical reaction is this if calcium carbonate is heated?
thermal decomposition
Which carbonate decomposes most easily?
Teaching notes
| Carbonate | Colour before heating | Ease of decomposition |
|---|---|---|
| Sodium carbonate | White | Very difficult |
| Zinc carbonate | White | Fairly easy |
| Lead carbonate | White | Fairly easy |
| Copper carbonate | Green | Easy |
Why does water make calcium carbonate heated?
Mineral deposits are formed by ionic reactions resulting in the formation of an insoluble precipitate. For example, when hard water is heated, Ca2+ ions react with bicarbonate (HCO3-) ions to form insoluble calcium carbonate (CaCO3), as shown in Equation 1.
What are the 3 problems that results from having hard water?
Here are some of the common household problems related to hard water: Scale buildup inside water supply pipes, restricting water flow. Film and scale buildup on ceramic tile and fixtures. Difficulty rinsing off soap and shampoo completely, leaving skin or hair feeling dry or dull.
Does boiling water reduce hardness?
This happens when water is boiled. As you can se boiling the water causes the precipitation of solid calcium carbonate or solid magnesium carbonate. This removes the calcium ions or magnesium ions from the water, and so removes the hardness. Therefore, hardness due to hydrogencarbonates is said to be temporary.
Why is soft water a problem for plumbers?
Soft water may leach heavy metals from pipes and appliances and makes using it as drinking water, or water for cooking, undesirable on a frequent basis. Hence the need for a separate drinking water tap. Soft water undoubtedly lathers better than hard water.
What is a disadvantage of soft water?
The major disadvantage to water softening is the potential health risks for people on low sodium diets. The exchange of hardness minerals for sodium adds 7.5 milligrams per quart for each gpg of hardness removed. In addition, calcium and magnesium are eliminated from the homeowner’s diet.
Will softened water hurt plants?
Most plants cannot tolerate high amounts of salt. The sodium in softened water actually interferes with the water balance in the plants and can kill plants by “fooling” them into thinking they have taken up more water than they have. Softened water essentially causes the plants in your garden to die of thirst.
Does soft water help pipes?
A water softener can help prevent plumbing damage by removing the excess minerals from the water. The softener works by releasing its own chemicals into the water to reduce the calcium and magnesium, making the water taste and smell better, easier on your skin and clothes, as well as protecting your water pipes.
Is soft water corrosive to pipes?
Naturally soft water is corrosive as it has a low pH and low TDS; however, cation-exchange water softening does not contribute to any factors that accelerate corrosion. Also, there is a lack of scientific evidence supporting the claim that hard-water scale is an effective form of corrosion control.
Can a water softener causing air in pipes?
If you notice AIR in the water lines the morning after your softener has regenerated, AND the brine water level is normal ( meaning the valve has been sucking the water out and refilling properly ), then the problem is caused by the “air check” failing to close ( check ).
Does salt water damage pipes?
Without proper flushing, salt can remain in your plumbing system and will slowly eat away at the metal. In addition to your plumbing, check appliances after saltwater exposure. Salt will continue to do damage even after it dries, so thorough cleaning is very important.
Is it good to pour salt down your drain at night?
The salt will help break down grease and emulsified fats so that they can be flushed through the pipes more easily by the vinegar and hot water.
What does salt water do to plumbing?
Over time, the corroded metal may disintegrate. This can lead to a burst pipe and flooding within your walls. But even before that happens, you may experience the impact of saltwater corrosion. Increased minerals in your water can impact water quality—leaving your tap water with a bad taste or foul odor.
Can roots grow through PVC pipe?
Roots penetrate these openings to reach the nutrients and moisture inside the pipes. Concrete pipe and PVC pipe may also allow root intrusion, but to a lesser extent than clay. PVC pipe usually has fewer and more tightly fitted joints which are less likely to leak as a result of settlement around the pipe.
How do you stop tree roots from growing into pipes?
Create a Barrier Between Trees and Sewer Lines Slow-release chemicals, such as copper sulfate and potassium hydroxide, are commonly used in residential settings. Spread these growth inhibitors near the sewer line to prevent root growth into the area.
Does salt damage PVC pipe?
PVC is very strong and is not affected much by the environment. It is also resistant to salt water, which is a problem because PVC waste that ends up in the ocean does not decompose.
What dissolves tree roots in sewer lines?
How to Kill Tree Roots in Sewer Line
- Rock Salt: tree roots growing around and in sewer pipes will be killed with the use of about a cup of rock salt flushed down the toilet.
- Copper Sulfate: while less effective than rock salt, copper sulfate is used to kill tree roots in sewer lines and deter the clogging of pipes.
Does homeowners insurance cover tree roots in sewer line?
In the basic Homeowners 3 policy there is no coverage for backup of sewers and drains. Tree roots can cause extensive damage to the foundation of your home, fences, and the sewer pipes. So it’s a good idea to occasionally have your pipes looked at by sewer and drain professionals.
Will Epsom salt kill tree roots in sewer line?
Use Epsom Salts to Kill Tree Stumps If you have a felled tree stump in your yard, its roots could still be growing underground and searching for the water in your pipes and septic tank. Using an Epsom salts solution kills and rots the tree, including the roots that have found their way into your sewer lines.
Will vinegar kill tree roots in sewer line?
To make this environmentally friendly root killer, mix a cup each of regular table salt, baking soda, vinegar and boiling water and immediately flush it down the toilet. The solution kills roots on contact, but it takes time for the dead roots to wash away, so you won’t notice immediate results.