Write an equation to show the reaction between Plaster of Paris and water.
The chemical equation for the reaction of Plaster of Paris and water can be represented as
$\underset{Plaster\,\,of\,\,Paris}{\mathop{CaS{{O}_{4}}.\frac{1}{2}{{H}_{2}}O}}\,\,+\underset{Water}{\mathop{1\,\frac{1}{2}{{H}_{2}}O}}\,\,\to \,\underset{Gypsum}{\mathop{CaS{{O}_{4}}.2{{H}_{2}}O}}\,$
What is the common name of the compound $CaOCl_2$ ?
Give two important uses of washing soda and baking soda.
Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.
Five solutions $A,\,B,\,C,\,D$ and $E$ when tested with universal indicator showed $pH$ as $4,\,1,\,11,\,7$ and $9$, respectively. Which solution is
$(a)$ neutral ?
$(b)$ strongly alkaline ?
$(c)$ strongly acidic ?
$(d)$ weakly acidic ?
$(e)$ weakly alkaline ?
Arrange the $pH$ in increasing order of hydrogen-ion concentration.
You have been provided with three test tubes. One of them contains distilled water and the other two contaln an acidic solution and a basic solution, respectlvely. If you are glven only red litmus paper. how will you identify the contents of each test tube ?