Terms And Names Flashcards
Ostwald rippening
Dissolution of small ppts and their re-precipitation on the surface of large crystals.
Occurs during the process of digestion in Gravimetry
Mother liquor
The solution in which the precipitate has been formed
What is the Von Weimarn equation?
(Q-S)/S
Q - conc. of reagents before pption
S - solubility of the ppt. at equilibrium
Coagulation
Colloidal particles coming together to form larger particles that eventually settle as residue or float on the surface
Co-precipitation
Compounds that are originally soluble in the mother liquor, get precipitated along with the desired ppt.
What is meant by Mixed crystal formation?
The contaminant ion, of almost the same size and charge as that of the desired ion, replaces it in the precipitate
Occlusion
When a crystal is growing rapidly during ppt. formation, foreign ions in the counter ion layer may become trapped/occluded within the growing crystal
Mechanical entrapment
It occurs when crystals lie close together during growth. Several crystals grow together and in doing so, a portion of the solution gets trapped in a tiny pocket
What is the difference between co-pption and post-pption?
Co-ppt. - Occurs while crystal growth is occurring
Post-pption - process where impurities get adsorbed onto the surface of the required ppt. (Occurs after the required ppt has been formed)
What is Poidy?
Number of sets of chromosomes present in a cell
What is Genome?
Haploid set of chromosomes present in a gamete
Polypoidy
Condition in which the organism has an extra pair of chromosomes in it’s gamete
What is Redox?
Reduction (gain of electron) + oxidation (loss of electron)
What is Population?
Total number of people involved in an experiment
What is meant by Sample?
Subset of population?
What is Descriptive statistics?
Used to measure or describe the data
What is Inferential statistics?
Used to make inferences in an experiment
What is Central tendency?
The average value or mean value of the data
What is meant by Variability?
The difference between individual values from the mean value
What is sample denoted by?
X bar
What is population denoted by?
Mu
What is meant by Skewness or Skewd distribution?
A graph based on the variation or difference between mean, median and mode
What is meant by Unimodel distribution?
One number is repeated most number of times
What is meant by Bimodel distribution?
2 or more numbers are repeated most number times in a specific data
What is meant by Multi-model distribution?
Multiple numbers are repeated most number of times in a specific data
What is meant by Kurtosis?
Degree of difference in the variation of mean, median and mode from the central tendency
What is other name of +ve kurtosis?
Leptokurtic (diff between mean, median and mode is very neglibible)
What is the other name of Normal distribution?
Mesokurtic
What is the other name of -ve kurtosis?
Platykurtic (huge variation between mean, median and mode)
What is the relation between variance and standard deviation?
Root(variance) = standard deviation
What is Scattered plot for?
Determining the relationship between 2 variables
What is Bar Graph for?
For representing discrete data
What is Pie chart for?
For expressing fraction and proportions
What is Histogram for?
For representing continuous data
What is Response surface plot for?
For representing 2 independent variables and one dependant variable
What is Contour plot for?
For representing 2 independent variables against each other
What is Co-relation and Regression for?
To quantify the strength of relationship between 2 variables
What is Regression analysis?
Analysing the relationship between x/y or x/y/z by drawing a line
What constitutes a large sample?
More than 30 people
What constitutes a small sample size?
Less than 30
What is meant by Parameter?
Data collected from a population
What is meant by Statistics?
Data collected from a sample
What is meant by Margin of Error?
Degree to which your results differ from the true values
