The element X should be identified, number of neutrons in it should be calculated and the name of the compound should be identified. Concept Introduction: The ionic compounds are formed by ions bonding together with strong electrostatic interaction due to opposite charge. In general, there are two types of ions: positive metal ions and negative non−metal ions. When a neutral atom gains electron/s, it acquires negative charge and gets converted into anion. Similarly, loss of electron/s from an atom results in the formation of cation. Mass number is equal of number of protons and neutrons present in an atom. Atomic number is equal to number of protons and number of electrons in a neutral atom.

Question

Propagation of uncertainty. You have a stock solution certified by the manufacturer to contain 150.0±0.03 µg SO42-/mL. You would like to dilute it by a factor of 100 to obtain 1.500 µg/mL. Calculate the uncertainty in the two methods of dilution below. Use the following uncertainty values for glassware: Glassware Uncertainty (assume glassware has been calibrated and treat the values below as random error) 1.00 mL volumetric pipet 0.01 mL 10.00 mL volumetric pipet 0.02 mL 100.00 mL volumetric flask 0.08 mL Transfer 10.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask. Then take 10.00 mL of the resulting solution and dilute it a second time with a 100 mL flask. 2. Transfer 1.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask.

Answer 1

Question

Chapter 5, Problem 6ALQ

Interpretation Introduction

Interpretation:

The element X should be identified, number of neutrons in it should be calculated and the name of the compound should be identified.

Concept Introduction:

The ionic compounds are formed by ions bonding together with strong electrostatic interaction due to opposite charge. In general, there are two types of ions: positive metal ions and negative non−metal ions. When a neutral atom gains electron/s, it acquires negative charge and gets converted into anion. Similarly, loss of electron/s from an atom results in the formation of cation.

Mass number is equal of number of protons and neutrons present in an atom. Atomic number is equal to number of protons and number of electrons in a neutral atom.

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