Use the henderson–hasselbalch equation to calculate the ph of each solution: part aa solution that is 0.145 m in propanoic acid and 0.115 m in potassium propanoate express your answer using two decimal places. php h = nothingrequest answerpart ba solution that contains 0.690% c5h5n by mass and 0.955% c5h5nhcl by massexpress your answer using two decimal places. php h = nothing request answer part a solution that is 11.0 g of hf and 25.5 g of naf in 125 ml of solutionexpress your answer using two decimal places. php h = nothingrequest answerprovide feedback

Asquare 1m x 1m plate is shown below. all four of its edges are kept at 0 co. at t=0the temperature distribution is given by: y xtsins n75)=.a) using separation of variables determine the temperature distribution t(x,y,t)along the plate at any time t.b) discretize the heat conduction equation +=22222 txtusing a second-order centered difference scheme for the two second derivatives and a first-order forward euler scheme for the first derivative. using von neumann stability analysis, determine the stability criterion for the proposed discretization scheme in terms of , hand t. solve for the maximum allowable time step tmax