standardize the given solution of sodium hydroxide volumetrically

Question 1

what is a standard solution

Answer 1

solution whose concentration is precisely known

Question 2

some strings are basic e.g. nettle strings and wasp strings. They contain basic substance histamine. How will you treat a person beaten by a wasp

Answer 2

First we will wash the infected region by the soap and then we will treat with a week dilute acid sucha s vinegar

Question 3

why sodium hydroxide solution cannot be used as a primary standard.

Answer 3

NaOH being a strong base, reacts with atmosphere CO2 to form NaCO3 this disturbs its purity {NaOH is not stable}

Question 4

what color does phenolphthalein give at the end of chemical reaction

Answer 4

pink——-»> purple

Question 5

write a balanced chemical equation for the reaction that takes place during the standardization of sodium hydroxide

Answer 5

NaOH + HCL———-> NaCL + H2O

Question 6

what does strength of a solution means?

Answer 6

amount of solute (in g) dissolved per litre of a solution