Question

Could i see the answers for the questions in each section please ? and how you got them please ?

thank you !

Molarity/Dilution/Titration M mol/L Examples of how to solve Acid/Base Reactions HA HA H,A() Terminology: Equivalence point/Endpoint is when all acid has turn into water (no acid left) M,V, M,V P ВОН ВОН + + BОН), + During a titration experiment, when you add 52.00mL of 0.98 M Br(OH), to 42.00 mL of H,A to reach the equivalence point. What is the concentration of H,A? The MW of H,A 69.0 g/mol Light and Energy Eqns: E= h*c/ E-Ry (1/n2- 1/n,2) c 3.00* 10 m/s E=h*v c*v h/m*v R=-2.18*101J 10° nm mass(m) is in "kg" Constants: h= 6.626*1034 J*s Units/Terminology: Hz (1/s) n, final energy state J kg*m2/s2 Im initial energy state n, Example: the energy from n = 1 to n wording 4, n 1 would be n, and n 4 would be n, based on the [Look at board] a. Find the wavelength b. Find the frequency c. Find the energy d. Is energy absorbed or emitted here e. Is the energy absorbed or emitted here Electron Configuration Identify the electron configuration of the following species in Full, Abbreviated, and nl O B Cr Pt Br Bi Fe Y

Answer 1

- AB (Salt) + H₂O water) Titration! Haaa) + BOH (Acid) (Base) H₂ A (aa) + 2 BOH 2 H₂A (aa) + 3 BOH), → AB2 + 2H₂O A₂B₂ + 6H₂O J an titration at equina lance point the moles of acid and the moles of bose become equal ie. M,U, = M₂ V₂ Muv, м, у, 3 x Ma x 42.00 = 2x0.98M * $2.00 Bec Tripactic acid each base release 2 OH Ma=0.809 ml Number of moles of H₂A = Molarity x volum in liter 0.809 x 42.00 1000 Light and Energy: = 0.034 mol E=RA (1 2 - 1 12 ) E = -2.18x10-1s (to-+). c) c) E = 2.044 X10-18g] a ez her Este her - 972 x10 m - 6o 626 X10 -34 JS X3 * 108 mis ALS 2.044 Xioto J b) E = ho E) = X 2.044*10-12 | 6. 6 2 6 * -3 T = 3.055 x o s d) Energy is absorbed here as the sign is positive for the energy also we know that energy is required to extite electrons from lower state to higher state.

Electronic configuration! cry 15² 2s²2p6 38² 3p6 45' 3d5 Atomic number = 24 [Ar ] 45' 3d5. Cr3t - [Ar] 45° 3d² is? 25 206 35² 306 48² 3d'°4p6 55² 4do speap 4 g Pt - Atomic number 78 651 - [Xe] 4fla sa 65' Pt² + ₃ [Xe] 48 14 sdo 65