why calcium carbonate is preferred for preparing carbon monoxide
Answers
Explanation:
Three types of calcium carbonate-containing rock are excavated and used by industry. They are limestone, chalk and dolomite. Limestone and chalk are both forms of calcium carbonate and dolomite is a mixture of calcium and magnesium carbonates. All have impurities such as clay but some rocks are over 97% pure. Limestone and other products derived from it are used extensively in the construction industry and to neutralise acidic compounds in a variety of contexts.
In the chemical industry, large quantities of limestone are heated to ca 1500 K to form calcium oxide, known as quicklime:
Water can be added to lime to form calcium hydroxide. The process is known as 'slaking'. Solid calcium hydroxide is known as slaked lime or hydrated lime, and solutions and suspensions in water as milk of lime.
The term lime is often used to cover quicklime, slaked lime (hydrated lime) and milk of lime.
For a particular use, an appropriate choice is made from the four: limestone, quicklime, slaked lime or milk of lime. In many uses, lime reacts more quickly than limestone but is more expensive, because a high temperature is required to produce it from limestone.
Uses of limestone and lime
Figure 1 Principal uses of limestone and lime.
The principal uses, by far, of limestone and lime are in the construction industry and cement making. They are also used in the chemical and metallurgical industries and in agriculture.
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