A 20.00 mL sample of HCl with unknown concentration is titrated with 0.50 M NaOH. a) Write out the balanced equation

b) Write out total ionic equation

c) Write out net ionic equation

d) If 15.0 mL of NaOH was required to reach the equivalence point (point where phenolphthalein turns pink) what is the concentration of the HCl solution. Please include some of your work as best as you can in the answer for full marks.

Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

When the volume and number of particles of a gas are constant which of the following is also constant

Blank allows you to do calculations for situations in which only the amount of gas is constant a)boyle's law b)combined gas law c)ideal gas law d)dalton's law