What weight of Ag_2CO_3, (FW-275.7) is fanned? W hat is the difference between c

Question

What weight of Ag_2CO_3, (FW-275.7) is fanned? W hat is the difference between constant error and proportional error? Give illustrative examples of each. Indicate whether each is a source of determinate or indeterminate error Voltage decrease in a battery operated measuring device during measurement Electrical measurement take during non-routine laboratory voltage transformer Undetectable vibrations through-out building and measurement lab Small excess of reagent needed to give an indicator color change in a titration

Explanation / Answer

Answer:-

4. Constant Error :- Constant error is also called deteminate or systematic error. These are the errors which cab be avoided and whose magnitude can be detemined and the measurements rectified. A constant error is characterised by the fact that it affects to the same degree the results of a series of determinatoins. For example, Errors in reading the burette, using impure reagents etc.

Proportional Errors:- Proportional error may arise from an impurity in a standard substance which leads to an incorrect values for the molarity of the standard substance. For example, Error in the preparation of standard solution of oxalic acid.

5.

(a) Indeterminate error

(b). Determinate

(c).Indeteminante

(d). Determinte

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