Introduction to Analytical Chemistry

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Analytical chemistry is the branch of chemistry that deals with the study of separation, identification, qualitative and quantitative determination of compositions of different substances. It has two …

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Dry method: Sample under test is not dissolved and is analyzed directly. Usually used as preliminary tests in qualitative analysis. Examples include flame tests, borax bead tests. Wet method: Sample i…

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Scientific notation: 4.56 × 10⁻⁶. The decimal point is moved 6 places to the right, hence the exponent is -6. Number of significant figures: 3 (all non-zero digits 4, 5, 6 are significant).

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Step 1: Multiply the coefficients: 2.5 × 3.2 = 8.0 Step 2: Add the exponents: 4 + (-3) = 1 Step 3: Combine: 8.0 × 10¹ = 80 Answer: 8.0 × 10¹ or 80…

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Accuracy: Nearness of measured value to the true value. Precision: Reproducibility of measurements (how close repeated measurements are to each other). Difference: You can have high precision with low…

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Absolute error = Observed value - True value Relative error = (Absolute error/True value) × 100% Absolute error gives the actual difference, while relative error gives the percentage error, which is m…

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1. All non-zero digits are significant 2. Zeros between non-zero digits are significant 3. Leading zeros are NOT significant 4. Trailing zeros after decimal point ARE significant 5. Trailing zeros wit…

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(a) 0.0250 = 3 significant figures (2, 5, 0 after decimal) (b) 305.00 = 5 significant figures (all digits including trailing zeros after decimal) (c) 4.0 × 10³ = 2 significant figures (4 and 0 in scie…