How many moles of acid are there in 20 ml of a 2.0 M HCl solution?
mol = M x L = ?
To calculate the number of moles of acid in a solution, we can use the formula:
moles = concentration × volume
In this case, the concentration of HCl is given as 2.0 M (moles per liter) and the volume is given as 20 ml (milliliters).
First, we need to convert the volume from milliliters to liters since the concentration is given in moles per liter. There are 1000 ml in 1 liter, so 20 ml is equal to 20/1000 = 0.02 liters.
Now we can calculate the number of moles:
moles = 2.0 M × 0.02 L
moles = 0.04 moles
Therefore, there are 0.04 moles of acid in 20 ml of a 2.0 M HCl solution.