How many anions are there in 2.50 g of mgbr2 – In this exploration, we embark on a journey to determine the number of anions present in 2.50 g of magnesium bromide (MgBr2), a compound commonly encountered in various chemical applications. This investigation delves into the fundamental concepts of molar mass, mole conversion, and anion definition, ultimately leading to a precise calculation of the number of anions within the given mass of MgBr2.
Number of Anions in MgBr2: How Many Anions Are There In 2.50 G Of Mgbr2
This article calculates the number of anions present in 2.50 g of magnesium bromide (MgBr2). The determination involves understanding molar mass, converting grams to moles, and applying the concept of anions in a compound.
1. Molar Mass Calculations, How many anions are there in 2.50 g of mgbr2
Molar mass is the mass of one mole of a substance. The molar mass of MgBr2 is calculated by adding the atomic masses of magnesium (24.31 g/mol), two bromine atoms (2 × 79.90 g/mol), and subtracting the mass of two electrons (2 × 0.0005486 g/mol):
Molar mass of MgBr2 = (24.31 g/mol) + (2 × 79.90 g/mol)
(2 × 0.0005486 g/mol) = 184.113 g/mol
2. Converting Grams to Moles
To convert 2.50 g of MgBr2 to moles, we divide the mass by the molar mass:
Moles of MgBr2 = 2.50 g / 184.113 g/mol = 0.01358 mol
3. Determining the Number of Anions
Anions are negatively charged ions. In MgBr2, each molecule contains one magnesium cation (Mg2+) and two bromide anions (Br-). Therefore, the number of anions in 0.01358 mol of MgBr2 is:
Number of anions = 2 × Moles of MgBr2 = 2 × 0.01358 mol = 0.02716 mol
4. Organizing Results
The results are summarized in the following table:
| Mass of MgBr2 (g) | Moles of MgBr2 | Number of Anions | Anion Concentration (M) |
|---|---|---|---|
| 2.50 | 0.01358 | 0.02716 | N/A |
Therefore, 2.50 g of MgBr2 contains 0.02716 mol of anions.
FAQ Overview
What is the molar mass of MgBr2?
The molar mass of MgBr2 is 184.11 g/mol.
How many moles of MgBr2 are present in 2.50 g?
To calculate the number of moles, we divide the mass by the molar mass: 2.50 g / 184.11 g/mol = 0.0136 mol.
What is the definition of an anion?
An anion is a negatively charged ion that is formed when an atom or molecule gains one or more electrons.
