It takes 222.46 mL of a 2.01 M HCl solution to neutralize 141.30 mL of NaOH solution. What is the concentration of the NaOH solution? Do not record units in your answer. Round to the tenths place or further.

Which one of the following is an oxidation-reduction reaction? naoh + hno3 --> h2o + kno3 naoh + hno3 --> h2o + kno3 so3 + h2o --> h2so4 cacl2 + na2co3 --> caco3 + 2 nacl ch4 + 2 o2 --> co2 + 2 h2o al2(so4)3 + 6 koh --> 2 al(oh)3 + 3 k2so4