Answer:
Molarity (M) = 4.09
(Written as 4.09M)
Step-by-step explanation:
Molarity (M) = mol/L
1st, calculate the number of moles of KI
Molar mass of K = 39.098g per 1 mol
Molar mass of I = 126.9g per 1 mol
39.09+126.9 = 165.99g/mol
Molar mass of KI = 165.99g/mol
Since Molarity (M) is in units of mol/L,
we need to change the given number of 340g of KI to moles.
340g × 1mol/165.99g = 2.05mol KI
Next, convert the given 500ml to Liters
500ml × 1L/1000ml = 0.5L
Lastly, plug these values into the eqaution for Molarity (mol/L)
2.05mol/0.5L = 4.096 M
Molarity (M) = 4.09