Question

wii you observe Hewpl wwill yow eb -clectron" will yoe CHM130 Name Section Date Score Pre-lab Assignment 1. Calculate the amount (in moles) of sodium hydroxide contained in 300, ml, of 0.100M NaOH ltion 2. Calculate the volume of 3,00M NaOH (the more concentrated solution) needed so prepare 300, ml. of 0.100M NaOH (the more dilute solution). Calculate the molar mass of potassium hydrogen phthalate (KHCsHeO). 3. 4. Calculate the amount (in moles) of NaOH in 35 mL of O.100M NaOH solution. 5. Write the balanced chemical equation for the reaction between sodium hydroxide and potassium hydrogen phthalate (KHP). Sndan Standardization of a NaOH Solution: 4

Answer 1

- Molarity = no. of moles of solute - Volume of solution (in litre) Here vol = 300mL = 300 t = 0.3 libre 1000 Molarity = 0.1 M no. of moles - Molarity x volume 1 = Org n x 0.3 litre = 10.03 moles) 0 no. of moles semain constant. MIVI = M₂ V2 (law of equivalence) - 11 3 XV, 0.1 X 0.3 V = 0.051 Os 10 m2] - 3 Molar mass = masses of individual elements 1 39 + + 8 X 2 + 4x + 4 x 16 E = 204 g/mot - 4 no. of moles= molarity xrolume (Ind) = l Oil M X 35 1000 0.0035 moles = ♡ Nach caq) + K HCX H404 (aq) -> KNa C8H404 (am) + H₂O (1)