Titration Calculation Flashcards
What are titrations used for?
To determine an unknown concentration of a solution
What is the unit for concentration?
Mol/Dm^3 or Mol/L
How is concentration like a ratio in how it’s measured versus actual substance concentrations
The concentration measurement is, if there were 1 dm^3 or liter of that substance, It would have X moles in that one decimeter/liter and it’d be proportionally the same as the actual substance amount and it’s concentration
What tools are used for measuring titration?
Conical flask, Burette, and pipettes (usually)
What are the usual pHs of the two substances being added together in titration
An acid and a base (Or alkali)
What is usually the formula for the equation of the reaction of two substances in titration?
Acid + Base = Salt + Water
Titre volume = ?
Start volume - End volume
What is concentration?
The amount of dissolved solute (added into solvent) per unit volume of solution (Usually dm^3 or liters)
What is a solution?
Solute dissolved in solvent (Usually something dissolved into water)
What is a first time titration that is likely to be an inaccurate result called?
Rough titration
What is more than one titration in 2 to 3 trials (w/ rough) and is usually more “accurate” than rough titrations
Accurate titrations
What are state symbols?
Symbols that tell what state of matter a substance is in (Ex. (s) for solid or (g) for gas)
What is one of the most important things to have in chemistry, labs, and chem tests?
A nice, clean looking table w/ data on it
How is a burette usually read in titration?
To the nearest half a scale, usually ending w/ 0.00 or 0.05 (Ex. 23.20 or 23.25 cm^3)
How do you actually look at a burette?
Crouch and line eyes with bottom of concave, or downward bent, water surface
What is meniscus?
A concave curve at the top of a substance in a titration device with a substance in it. It’s caused by surface tension and adhesion
What is the requirement for all accurate titration values?
They all need to be precise and be close in value ( Needs to be within 0.10cm^3 within each other )
The formula to find concentration
Moles/Volume (dm^3 or cm^3)
The formula to find moles
M = concentration/volume (M = Mass/ molecular mass..?)
What type of analysis is a Titration lab/experiment?
Quantitative analysis
How do you find the average titre?
Add up all of the Titre volumes and divide them by the number of trials done (Titre volume/# of trials)
Converting volume from Cm^3 to Dm^3?
Divide the value by 1000 (Ex. 25.0/1000 = 0.0025)
M = Mr x Mol could also be what?
M = Mr x (Concentration x Volume)
