What is Alkali?
An Alkali can be defined as a strong base that dissolves in the water and turns litmus paper from red to blue.
The word 'Alkali' is derived from the Arabic word 'qali' meaning 'from the ashes' since ashes mixed with water used as cleaning products (such as soaps) are made of alkali materials.
They react with acids and leaves neutral salts as the product.
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- (a) What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.(b) Why is the electrolysis of a concentrated solution of sodium chloride known as chlor-alkali process? (c) Name three products of the chlor-alkali process. State two uses of each of these products.
- List the important products of the Chlor-alkali process. Write one important use of each.
- (a) What is produced if an acid is added to a base?(b) Why does dry HCl gas not change the colour of dry litmus paper?(c) What colour does phenolphthalein indicator turn when added to an alkali (such as sodium hydroxide)?
- What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)?(a) Methyl orange (b) Litmus (c) Red cabbage extract
- The products of chlor-alkali process are:NaCl, Cl2, and H2.H2, Cl2, and NaOHCl2, Na2CO3, and H2ONaOH, CI2, and HCI
- Name the three products as 'chlor-alkali' process. Write one commercially or industrially important material each that can be prepared from each of these products.
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- The products of chlor-alkali process are:(a) NaCl, Cl2 , and H2 (b) Cl2 , H2 and NaOH (c) Cl2, Na2CO3 and H2O (d) NaOH, Cl2 and HCl
- 1). What is additive identity?2). What is Reciprocal?3). What is multiplicative inverse?
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