Can't get dimensions of arrays equal to plot with MatPlotLib - matplotlib

Question

I am trying to create a plot of arrays where one is calculated based on my x-axis calculated in a for loop. I've gone through my code multiple times and tested in between what exactly the lengths are for my arrays, but I can't seem to think of a solution that makes them equal length.
This is the code I have started with:
import numpy as np
import matplotlib.pyplot as plt
a = 1 ;b = 2 ;c = 3; d = 1; e = 2
t0 = 0
t_end = 10
dt = 0.05
t = np.arange(t0, t_end, dt)
n = len(t)
fout = 1
M = 1
Ca = np.zeros(n)
Ca[0] = a; Cb[0] = b
Cc[0] = 0;
k1 = 1
def rA(Ca, Cb, Cc, t):
-k1 * Ca**a * Cb**b * dt
return -k1 * Ca**a * Cb**b * dt
while e > 1e-3:
t = np.arange(t0, t_end, dt)
n = len(t)
for i in range(1,n-1):
Ca[i+1] = Ca[i] + rA(Ca[i], Cb[i], Cc[i], t[i])
e = abs((M-Ca[n-1])/M)
M = Ca[n-1]
dt = dt/2
plt.plot(t, Ca)
plt.grid()
plt.show()
Afterwards, I try to calculate a second function for different y-values. Within the for loop I added:
Cb[i+1] = Cb[i] + rB(Ca[i], Cb[i], Cc[i], t[i])
While also defining rB in a similar manner as rA. The error code I received at this point is:
IndexError: index 200 is out of bounds for axis 0 with size 200
I feel like it has to do with the way I'm initializing the arrays for my Ca. To put it in MatLab code, something I'm more familiar with, looks like this in MatLab:
Ca = zeros(1,n)
I have recreated the code I have written here in MatLab and I do receive a plot. So I'm wondering where I am going wrong here?
So I thought my best course of action was to change n to an int by just changing it in the while loop.
but after changing n = len(t) to n = 100 I received the following error message:
ValueError: x and y must have same first dimension, but have shapes (200,) and (400,)
As my previous question was something trivial I just kept on missing out on, I feel like this is the same. But I have spent over an hour looking and trying fixes without succes.