D IS A SOLUTION CONTAINING 4.9G/DM³ OF H²SO⁴. E CONTAINS IMPURE SAMPLE OF KOH PER DM³ OF SOLUTION. THE VOLUME OF D IS 25CM³ WHILE THAT OF E IS 24.50CM³ 1. Write a balance chemical equation of reaction
2. Calculate the
i. Concentration of solution D in mol/dm³
ii. Concentration of solution E in mol/dm³
iii. Mass of KOH in 1.00dm³ of solution E
{H=1, O=16, S=32, K=39}

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.