Chem 280 Final Questions with 100% complete Solutions Passed (GRADED A+)

Chem 280 Final Questions with 100% complete Solutions Passed (GRADED A+) What is the difference between external standard method, standard addition method and internal standard method? - VERIFIED ANSWER-External Standard Method: Unknown samples have similar composition and the matrix is known. Have to have to 5 samples but not all have to have high matrix. Standard Addition Method: Used for more complex and unknown matrices for 1 unkno wn sample. Internal Standard Method: used when don't need volume and measure using matrix composition The standard addition method is not the best method when the sample matrix can interfere with the …