Which statement describes the reactions in an electrochemical cell? 1.Oxidation occurs at the anode, and reduction occurs at the cathode.
2.Oxidation occurs at the cathode, and reduction occurs at the anode.
3.Oxidation and reduction both occur at the cathode.
4.Oxidation and reduction both occur at the anode.

Sorry i think the answer is b

It must be measured in k.hope my answer is to you : )

The answer is c. risk

The reaction 2kalsi3o8 + 2(h+ + hco3-) + h2o  →  al2si2o5(oh)4 + 2k+ + 2hco3- + 4sio2 shows that feldspar kalsi3o8 is chemically altered by hydrolysis to form chalky-looking clay mineral kaolinite al2si2o5(oh)4. the chemical breakdown of potassium feldspar due to exposure to acidic water results to the mineral binding with the water molecule to become kaolinite with silica and potassium and bicarbonate ions in solution.