A solution of known molarity is called a standard solution. Its concentration is determined by a process known as standardization. solution of known molarity is called a standard solution. Its concentration is determined by a process known as standardization.
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Ceiling tile is sold in many different materials, sizes and thicknesses and made to fasten directly to ceilings or fit into a grid system called a suspended or drop ceiling. Popular types include cork, tin, plastic and acoustical. Acoustical ceiling tile reduces noise, as it has sound absorbent properties.