pH
What is the formula to solve for pH?
pH= -log([H+])
Write a balanced chemical equation that corresponds with: Ksp= [Mg^2+]^3[PO4^3-]^2
Mg3(PO4)2 (s) ⇌ 3 Mg ^2+ (aq) + 2 PO4 ^3- (aq)
CS2 (g) + 4 H2 (g)⇌ CH4 (g) + 2 H2S (g)
What is the response (to reactants, to products, or no change) if some CS2 is removed?
to reactants
What animal hibernates through most of the winter?
Bear
A 0.17M solution of a weak acid is 33.7% ionized. Find pH.
pH= 1.24
Write a balanced chemical equation that corresponds with: K= [NH4+][OH−]/[NH3]
NH3(aq)+H2O(l)⇌NH4+(aq)+OH−(aq)
CS2 (g) + 4 H2 (g)⇌ CH4 (g) + 2 H2S (g)
What is the response (to reactants, to products, or no change) if some H2S is removed?
to products
What day is the meteorological start date of winter in the Northern Hemisphere?
December 1st
What is the pH of 0.216 M H2SO4 (aq) at 25 degrees Celsius?
pH= 0.67
Write a balanced chemical equation that corresponds with: K =[NO2]^2/[N2O4]
N2O4(g)⇌2NO2(g)
CS2 (g) + 4 H2 (g)⇌ CH4 (g) + 2 H2S (g); delta H=-232.77 kJ
What is the response (to reactants, to products, or no change) if pressure is increased?
to the products
What is the shortest day of the year in the Northern Hemisphere called?
Winter Solstice
Find the pH of a 1.5×10⁻³ M NaOH solution.
pH= 11.18
Write a balanced chemical equation that corresponds with: K= [Fe(CN)6^4−]/[Fe^2+][CN^−]^6
Fe^2+(aq)+6CN^−(aq)⇌Fe(CN)6^4−(aq)
CS2 (g) + 4 H2 (g)⇌ CH4 (g) + 2 H2S (g); delta H=-232.77 kJ
What is the response (to reactants, to products, or no change) if the temperature is increased?
to the reactants
What percentage of a snowflake is actually air?
95%