olm.general.solution

class olm.general.solution(constituents, concentrations, units, T=25.0, T_units='C', cond=None, pH=None)

A solution class, that is used for calculations related to chemical solutions.

Parameters:

constituentsarray like

a list (or array) of strings with ion names

concentrationsarray like

a list (or array) of ion concentrations

unitsstring or list

a string or list of strings containing concentration units (‘mg/L’, ‘mol/L’, or ‘mmol/L’)

Tfloat

temperature in degrees Celsius (default=25)

T_unitsstr

temperature units ‘C’ or ‘K’ (default=’C’)

condfloat

specific conductance (default=None)

pHfloat

pH of solution (default=None)

Attributes:

ionsdict

A dictionary containing ion activities and concentrations. The values for a given ion are accessed using a the name of the ion as a key. Then, the additional keys ‘activity’, ‘conc_mg’, ‘conc_mol’, ‘conc_mmol’, and ‘meq’ access the ion activity (in units of mol/L), concentration in mg/L, concentration in mol/L, concentration in mmol/L and meq/L, respectively.

T_Cfloat

temperature of solution in degrees C

T_Kfloat

temperature of solution in degrees K

__init__(constituents, concentrations, units, T=25.0, T_units='C', cond=None, pH=None)

Methods

I()	Function to calculate ionic strength of the solution object from full equation using known ion properties.
__init__(constituents, concentrations, units)
activity(ion)	Retrieve the activity of a given ion in the solution in mol/L.
activity_coef(ion[, I])	Calculate activity coefficient, gamma, for a given ion in the solution.
approxI()	Function to calculate approximate ionic strength of solution metal concentration.
charge_balance([units])	Calculate the charge balance error for this solution.
meq(ion)	Retrieve meq for a given ion in the solution.
mg(ion)	Retrieve the concentration of a given ion in the solution in mg/L.
mmol(ion)	Retrieve the molar concentration of a given ion in the solution in mol/L.
mol(ion)	Retrieve the molar concentration of a given ion in the solution in mol/L.