Why is anhydrous sodium carbonate used as a primary standard

Asked by admin @ 02/08/2021 in Chemistry viewed by 266 People

Why anhydrous na2co3 is considered as primary standard

Answered by admin @ 02/08/2021

Answer:

Only those acids or bases areconsidered primary standard which are stable and hence their strength do not change with time.Strength ofNa2CO3 also do not change hence it isconsidered as a primary standard.Na2CO3 is used as primary standardbecause it's solution's molarity remains constant for a very long period.

Why is the reasonable doubt standard used in criminal cases

Asked by admin @ 22/11/2021 in Social Studies viewed by 280 persons

Why is the reasonable doubt standard used in criminal cases?

Why constantan wire is used for making standard resistances

Asked by admin @ 23/08/2021 in Physics viewed by 302 persons

Constantan wire is used in making standard resistances because its a) specific resistance is low b) density is high c) temperature coefficient ofresistance is negligibled) melting point is high

Which alkane would have only primary and tertiary carbon

Asked by admin @ 17/08/2021 in Chemistry viewed by 304 persons

Which alkane would have only primary and tertiary carbon?

Which of the following is not a primary standard

Asked by admin @ 13/08/2021 in Chemistry viewed by 357 persons

10. Which of the following is not a primary standard substance (a) Na (b) Na S,0, (c) ZnSO, (d) K2C2044

Which of the following is not an primary standard

Asked by admin @ 11/08/2021 in Chemistry viewed by 348 persons

10. Which of the following is not a primary standard substance (a) Na (b) Na S,0, (c) ZnSO, (d) K2C2044

Why eureka metal is used to make standard resistance coil

Asked by admin @ 03/08/2021 in Physics viewed by 284 persons

Why eureka metal is used to make standard resistance coil?

Very large numbers can be expressed in standard form using

Asked by admin @ 02/08/2021 in Math viewed by 298 persons

Very large number Can be expressed in standard form using dash exponent

Among human populations the primary use of freshwater is for

Asked by maham237 @ 19/05/2021 in Biology viewed by 348 persons

A. energy. B. drinking and cooking. C. flushing toilets. D. agriculture and industry. it's not B what is the correct answer ?

Advantage of network devices using open standard protocols

Asked by maham237 @ 12/01/2021 in Computers And Technology viewed by 434 persons

What is an advantage of network devices using open standard protocols?

Why is potassium hydrogen phthalate a good primary standard

Asked by maham237 @ 03/01/2021 in Chemistry viewed by 277 persons

A solution of the primary standard potassium hydrogen phthalate (KHP), KHC8H4O4 , was prepared by dissolving 0.4877 g of KHP in about 50 mL of water. Titration of the KHP …

What is y=-4/5x-2 written in standard form using integers?

Asked by maham237 @ 31/12/2020 in Mathematics viewed by 271 persons

Sodium thiosulphate is used in photography because of its

Asked by admin @ 17/08/2021 in Chemistry viewed by 263 persons

Sodium thiosulphate is used in photography because of its(a) reducing behaviour (b) oxidising behaviour(c) complex forming behaviour(d) reaction with light