Answer:
The answer to your question is 0.6 M
Explanation:
Data
Volume of HBr = 50 ml
Volume of NaOH = 20 ml
[NaOH] = 1.5 M
[HBr] = ?
Process
1.- Calculate the moles of NaOH
Molarity = moles/volume
-Solve for moles
moles = Molarity x volume
-Substitution
moles = 1.5 x 0.02
-Result
moles = 0.03
2.- Write the balanced reaction
HBr + NaOH ⇒ NaBr + H₂O
3.- Calculate the moles of HBr
1 moles HBr ------------------ 1 moles NaOH
x moles HBr --------------- 0.03 moles of NaOH
x = (0.03 x 1) / 1
x = 0.03 moles of HBr
4.- Calculate the concentration of HBr.
Molarity = 0.03 / 0.05
Molarity = 0.6 M
