Jess

Need help with the following questions, feel free to only answer one if you like.

1. 20.0ml of 0.0315molL-1 Mg(NO3)2 are added to 60.0ml of 0.00162molL-1 NaOH. Will a precipitate of Mg(OH)2 occur? Ks(Mg(OH)2)=1.00x10^-11. (Would like this one set out clearly will all steps so i can actually understand what is going on)

2. Titration of the Addition of 0.100molL-1 HNO3 to 20mL of 0.100molL-1 solution of weak base codeine. The pKa of the conjugate acid of codeine=8.21. What will the equivalence point be?

3.What are the species present in order of decreasing concentration for the following;

(A) Na2SO4

(B) KHCO3

(C)HOBr

(D)H2SO4

(E)NH3

(F)NH4NO3

Would like as many answers as possible please.

Thanks in advance. :)

20.0ml of 0.0315molL-1 Mg(NO3)2 are added to 60.0ml of 0.00162molL-1 NaOH. Will a precipitate of Mg(OH)2 occur? Ks(Mg(OH)2)=1.00x10^-11.

In as much detail as possible please.

Thanks in advance.

1. Will a precipitate of PbSO4 occur when 0.0390g of Pb(NO3)2 id dissolved in 500ml of 1.01x10^-4molL-1 H2SO4 solution? Ks(PbSO4)= 1.30x10^-8. M(Pb(NO3)2)=331.2gmol-1.

2. 20.0ml of 0.0315molL-1 Mg(NO3)2 are added to 60.0ml of 0.00162molL-1 NaOH. Will a precipitate of Mg(OH)2 occur? Ks(Mg(OH)2)=1.00x10^-11.

In as much detail as possible please.

Thanks in advance.

Im stuck on the following questions..

1. Choose a hereditary metabolic disorder and describe the genetic cause of the disorder and its consequences?

2.The following diagram shows part of the metabolic pathway involved in the biosynthisis of the essential amino acid phenylalanine.

Chorismate--(enzyme1)-->Prephenate--(enzyme2)-->Phenylpyruvate--(enzyme3)-->Phenylalanine.

Suggest a possible consequence to an animal if this metabolic pathway failed to operate?

3.Explain how DNA can carry large amounts of genetic information?

All help for any of the above questions would be greatly appreciated. Thanks in advance :)

I started this question then got confused half way through and now im completely lost :/

Will a precipitate of Ag2CO3 occur when 50ml of 0.00342molL-1 Na2CO3 solution is added to 50mL of 1.15x10^-4molL-1 AgNO3 solutuon.

Show all your working. Ks(Ag2CO3)=8.00x10^-12

Thanks in advance :)

I started this question then got confused half way through and now im completely lost :/

Will a precipitate of Ag2CO3 occur when 50ml of 0.00342molL-1 Na2CO3 solution is added to 50mL of 1.15x10^-4molL-1 AgNO3 solutuon.

Show all your working. Ks(Ag2CO3)=8.00x10^-12

Thanks in advance :)

Stuck on this question.

The value of Ks(Ag2CrO4) is 3.00x10^-12 at 25 degrees.

calculate maximum mass of solid Ag2CrO4 that can be dissolved in distilled water at 25 degrees.

Show all of your working. M(Ag2CrO4)=221.8gmol-1

Thanks in advance :)

Im stuck on this question.

The amount of CaSo4 that will dissolve in 500ml of water at 25 degrees is 0.204g.

Calculate the value of Ks(CaSO4) at 25 degrees. M(CaSO4)= 136.1gmol-1

Show all of your working.

All help would be greatly appretiated :)