# All Questions

40,429 questions
Filter by
Sorted by
Tagged with
9 views

### Acid-Base Titration: Calculate moles of acid and salt at equivalence point [closed]

Harry was given a sample of an unknown acid, HA(aq), with an unknown concentration and unknown volume, and it was titrated with 0.100 M NaOH(aq). Instead of using an indicator, Harry measured the pH ...
11 views

### Weak Base and Strong Acid Neutralization

Sodium bicarbonate, NaHCO3, is a weak base that is commonly used to neutralize acid spills. Explain what will happen to the pH of a solution of 0.10 M NaOH(aq) after a small amount of sodium ...
4 views

### How to convert 3.15 mg/ml stock to 200 ng/ml in total 200 ul water solution and make it pipettable? [closed]

I have 3.15mg/ml of a standard antibody, I need to make it 200 ng/ml in total 200 ul with another liquid
15 views

### Can the expression be represented as a total differential?

I should determine whether the following expression represents a total differential: $$\mathrm{d}f(x,y) = (\ln y) \,\mathrm{d}x + \frac{x}{y}\,\mathrm{d}y$$ But with the following method (physical ...
22 views

### What are some very soft metal alloys? [closed]

Specifically, I wonder what the softest alloys containing aluminum, tin and/or zinc are. How does one predict the properties of such alloys? Does the combination of two soft metals equal the creation ...
24 views

### Why doesn't tetrachloromethane react with aqueous sodium hydroxide under reflux?

$\ce{CCl4}$ does not react with hydroxide nucleophile whereas $\ce{CH3Cl}$ does. I had initially thought that it was due to symmetrical geometry of $\ce{CCl4}$ and so the dipoles cancel out and the ...
15 views

### showing that two halide ions are in the same solution [closed]

Suppose you were to have a solution containing both iodide and chloride ions(found a question in a past paper similar to this one, but couldn't figure it out).. how would you show that the solution ...
28 views

### Calculation of hypochlorite concentration from active chlorine

So in the lab we got sodium hypochlorite solution. The concentration is in active chlorine (13%) on the label. How do I calculate it to concentration of hypochlorite? I need certain amount of ...
24 views

### Why do Ferrocene and Nickelocene vary in their properties even though they're similar in structure? [closed]

Got this practice question for my finals but have no clue where to start. Could someone please help answer this? "Ferrocene and Nickelocene are similar in structure but vary in their properties. ...