PS1 - CHEMISTRY 15 Problem Set #1 (due on Thursday,...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEMISTRY 15 Fall 2009 Problem Set #1 (due on Thursday, September 9) 1. Average human blood serum contains 2.2 mM K + and 77.5 mM Cl - . What is the concentration of these ions in ppm and w% assuming that the density of the serum is 1.005 g/mL? 2. How many mL of conc. (55.00 w%) HNO 3 solution is required to prepare 1.8 L of 0.31 M solution? 3. 50.00 mL of an unknown H 2 SO 4 solution was added to 150 mL of distilled water and treated with an excess of BaCl 2 to precipitate BaSO 4 . The precipitate was filtered off, dried and weight. Its mass was 1.2930 g. Assuming that the soluble BaSO 4 remaining in equilibrium with the precipitate can be neglected, what was the molar concentration of the H 2 SO 4 unknown? 4. Calculate the absolute error, the relative error expressed as a fraction, and the relative error expressed as a percent for each of the experimental results below. Experimental Result True Value a. 18.29 ml 18.24 b. 3.46 x 10 -3 mol/L 3.50 x 10 -3 mol/L c. 38.6% T 41.6% T d. 18.6 mg/L
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/04/2010 for the course CHEM 15 taught by Professor Staff during the Fall '08 term at University of California, Berkeley.

Page1 / 2

PS1 - CHEMISTRY 15 Problem Set #1 (due on Thursday,...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online