Recent content by mimi88

As my graph has shown, my explanation is : the point of inflection is at the half of the maximum slope, where pH=pKa?

The question is ' What is the ratio of pH= pKa-1? Two choices are given : (a)10:1 (b)1:10 so I think the answer is (b)

Sorry for the mistakes. a) 10:1 b) 1:10

a ph vs enzyme activity graph, thanks

My explanation is : for ph=pka , the number of two ionic forms[A-] and [HA] are equal, then, for ph>pka,[A-]>[HA], the gratient gets smaller when ph is increased, and also, for ph<pka, [A-]<[HA], the slope is becoming larger when pH is increasing . Would u like to have a look of my explanation...

I think it is 1:10 but I am not sure the meaning of PKa -1, can someone explain it please.

is the electronic configuration of it d^3(t2g^3eg^0? And has two isomers?

Homework Statement How to draw it? Can someone tell me the electronic configuration of the chromium atom in tris( acetylaceato)chromium( III) please Homework Equations N/A The Attempt at a Solution N/A

Homework Statement If an amount of $1000 is deposited in a savings account that pays 3.2% interest per year compounded monthly, the amount in the account after nmonths is given by: The amount in the account after 2 years (rounded to one decimal point) will be??

Thank guys, now it makes more sense to me:)

Homework Statement The ratio of KMnO4 to I2 is given by 2 MnO4 - + 16 H+ + 10 I - ⇌ 2 Mn2+ + 5 I2 + 8 H2O the ratio is 2:5 - The ratio of I2 to S2O3 2- is given by 1 I2 + 2 S2O32- ⇌ 2 I-+ S4O5 2- the ratio is 1:2 therefore n(S2O3 2- ) = n(MnO4 - ) x 5 Homework Equations Why the mole of...

Homework Statement The expected Markovnikov addition product of HI to 2-methyl-2-butene is? 2. The attempt at a solution a. 1-iodo-2-methylbutane b. 2-iodo-2-methylbutane c. 2-iodopentane d. 3-iodo-2-methylbutane Relevant equations Can someone give me some clues ?

Thank you so much ;)

I this they are isotopes . Do you mean Allot-ropes for that element?

Ah...A is constitutional isomers?? And D is three-dimensional lattice??