The furring of kettles is caused by the presence of what ...
The furring of kettles is caused by the presence of what compound in water?
calcium tetraoxosulphate (IV)
calcium hydrogentrioxocarbonate (IV)
calcium hydroxide
calcium trioxocarbonate (IV)
Correct answer is D
Calcium hydrogen carbonate, often present in temporary hard water, is boiled in a kettle to remove the hardness. In the process, a scale forms on the inside of the kettle in a process known as furring of kettles. This scale is composed of calcium carbonate.
A plastic which cannot be softened by heat is described as ...
The oxidation state of Cr in K\(_2\)Cr\(_2\)O\(_7\) is?...
In the electrolysis of brine, the anode is ...
f 5.0 cm\(^-3\) of 0.200 mol dm(^-3\) Na\(_2\)CO\(_3\) was diluted to 250cm(^-3\)&nbs...
What is the common name for ethanoic acid? ...
The function of limestone in the extraction of iron in the blast furnace is...