Add hydrochloric acid to a concentrated solution of sodium hydroxide taken in a test tube. As the reaction proceeds, does the test tube become hot or cool?
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Answer:
An acid and base always react to form a salt and water, and it is called neutralization. The salt formed in this reaction is sodium chloride, NaCl. The equation for the reaction is : NaOH + HCl = NaCl + H2O.
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None None Nothing definite - generally coloured salt
Note: To obtain a reducing flame, with the help of a mouth blow pipe make the Bunsen burner flame luminous by closing the air holes of the burner. Keep the nozzle of the blow pipe just outside the flame and blow gently on to the cavity.
Note: To obtain a reducing flame, with the help of a mouth blow pipe make the Bunsen burner flame luminous by closing the air holes of the burner. Keep the nozzle of the blow pipe just outside the flame and blow gently on to the cavity.
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