What is the difference between accuracy and precision?

Accuracy is closeness to the true value; precision is the consistency of repeated readings

In paper chromatography, how is the Rf value calculated?

Distance moved by spot divided by distance moved by solvent front

It is more soluble in the solvent and less strongly held by the paper

The limewater turns milky (cloudy white)

It lowers the melting point and makes it melt over a range

Ink would dissolve in the solvent and move up the paper, interfering with the results

13questions. Pick an answer and you'll see why right away.

Which apparatus is most suitable for measuring out exactly 25.0 cm3 of a solution for a titration?
What is the difference between accuracy and precision?
Which method separates an insoluble solid from a liquid?
Which method is used to separate two miscible liquids with different boiling points, such as ethanol and water?
Which method would best separate two immiscible liquids such as oil and water?
In paper chromatography, how is the Rf value calculated?
A spot moves 5.0 cm and the solvent front moves 10.0 cm. What is the Rf value?
Why does a component with a higher Rf value travel further up the chromatography paper?
What is the test for oxygen gas?
What is observed when carbon dioxide is bubbled through limewater?
Which gas turns damp red litmus paper blue?
How does an impurity affect the melting point of a substance?
Why must the start line in paper chromatography be drawn in pencil rather than ink?