1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Travka [436]
3 years ago
14

A phosphate buffer is prepared with KH2PO4 at 0.02 M and K2HPO4 at 0.03 M. What is the concentration of phosphate buffer

Chemistry
1 answer:
Alona [7]3 years ago
6 0

Answer:

0.05M is the concentration of the phosphate buffer

Explanation:

A buffer is defined as the aqueous mixture of a weak acid (KH₂PO₄) and its conjugate base (K₂HPO₄). The concentration of this buffer is the sum of the concentrations of the weak acid and the conjugate base, that is:

Concentration of phosphate buffer = 0.02M + 0.03M

=

<h3>0.05M is the concentration of the phosphate buffer</h3>

<em />

You might be interested in
a triangular prism with bases that are right angles measuring 5 inch by 12 inch by 13 in the height of the prism is 2 in what is
valentinak56 [21]
The answer is 1,560 hope this helps if u multiply all of it
4 0
2 years ago
How many total atoms are in 0.380 g of P2O5
pogonyaev
The gram formula mass of P2O5 is 31*2 + 16*5 =142. The mole number of P2O5 is 0.380/142=0.00268 mol. There is 7 atom in one P2O5 molecule. And there is 6.02 * 10^23 molecule per mol. So the answer is 1.13*10^22 atoms.
7 0
2 years ago
Which compound is a saturated hydrocarbon?
mojhsa [17]
<span>Saturated hydrocarbons are organic compounds that contain only single bonds between the carbon atoms. They are known to be the simplest organic compounds. They are termed as such because they are saturated with water. Examples are the alkanes (ethane, methane, propane, butane, etc.).</span>
6 0
2 years ago
Unwanted elements are removed from metals by a process called
Grace [21]

Answer:

C. Refining

Explanation:

Refining process removes elements from a substance

6 0
2 years ago
PLEASE HELP ME ANSWER THESE QUESTIONS!
madam [21]

Answer:

1. 0.35 moles NaOH

2. 5.10x10^{-4} moles H_2SO_4

3. 505.4 g Pb

4. 1.46 g HCl (if that is wrong it's 1.5 g HCl due to sig figs)

5. 3.01x10^{23} atoms of Ag

6. 2x10^{-10} atoms of Cu

Explanation:

1. The mass of NaOH is 40g. 22.99(Na)+16(O)+1.01(H)=40 g

14 g NaOH *\frac{1 mol NaOH}{40 g NaOH} = 0.35 moles of NaOH

2. Mass of H_{2} SO_{4} = 2(1.01)+32.06+4(16) = 98.08

0.05 g H_2SO_4 ×\frac{1 mol H_2SO_4}{98.08g H_2SO_4} = 5.10 x10^{-4}

3. mass of Pb = 106.4 g

4.75 moles Pb×\frac{106.4 g Pb}{1 mol Pb} =505.4 g Pb

4. mass of HCl = 1.01 +35.45 = 36.36 g

0.04 mol HCl x \frac{36.46 g HCl}{1 mol HCl} = 1.456 = 1.5

5. 5.00 mol Ag x\frac{6.022x10^{23} atoms }{1mol Ag} = 3.01x10^{24} atoms

6. 3x10^{-10} moles Cu x\frac{6.022x10^{23} atoms}{1 mol Cu} = 1.8668x10^{14}= 2x10^{14} atoms of Cu

8 0
1 year ago
Other questions:
  • Atoms that have lost or gained one or more electrons are called ________.
    14·1 answer
  • Which type of force occurs between two objects at a distance?
    9·1 answer
  • The first-order decomposition of n2o at 1000 k has a rate constant of 0.76 s-1. if the initial concentration of n2o is 10.9 m, w
    11·1 answer
  • An uncharged atom of mercury has an atomic number of 80 and an atomic mass of 200. This atom has ________ protons, ________ neut
    9·1 answer
  • A cube has a mass of 100 grams and it’s density to be 1 g/cm cubed . The volume of the cube must be ?
    12·1 answer
  • 20. The mass of one mole of lead (Pb) atoms is 207.2 g. Use a proportion to calculate the n
    10·1 answer
  • What are all of the elements that end with F electrons
    12·1 answer
  • How many protons are in oxygen's nucleus?
    15·2 answers
  • Can you please help me with the second one please can you please show your work please
    13·1 answer
  • TIMED PLS HELP AND WILL GIVE BRAINLIST
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!