How many grams of sodium hydroxide are needed to make 250. ml of a 7.80 m solution?

78 g of NaOH

Given:

Question:

How many grams of sodium hydroxide are needed to make 250 ml of a 7.80 M solution?

The Process:

Step-1

Let us prepare the relative molecular mass (Mr) of NaOH.

Step-2

The concentration of the solution is a mole of solute divided by 1 liter of solution.

 (Remember V in liters here)

We know that mole is mass divided by molecular mass.

The relationship between concentration (M), mass, relative molecular mass (Mr), and volume of solution in ml (V) is as follows:

(Remember V in ml here)

Substitute all known data into the equation.

Mass = 7.80 x 10

Mass = 78

Thus, the number of grams of sodium hydroxide are needed to make 250 ml of a 7.80 M solution is 78 grams.

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Notes:

The concentration of the solution, especially in this case molarity, represents one significant data. Among them play a role in